Much thanks for these tutorials. Know that you're helping out a lot of young RF engineers all around the world, me included!

@BhargavaAnurag

2 жыл бұрын

Glad you like them!

I so much enjoy your tutorial, very logical and engaging. Many thanks, just can't wait for the rest of the tutorials

@BhargavaAnurag

3 жыл бұрын

Glad you like them!

Excellent tutorial. Thank you!

@BhargavaAnurag

3 жыл бұрын

You're very welcome!

Thank you so much for the super helpful detailed tutorial !

@BhargavaAnurag

2 жыл бұрын

You are so welcome!

WOW! This was an excellent tutorial! thanks

@BhargavaAnurag

3 жыл бұрын

Glad it was helpful!

Thanks for your great video. Hope you stay safe from this pandemic.

@BhargavaAnurag

3 жыл бұрын

I hope so too..😊

Thank you so much Anurag sir for making such kind of interesting videos that help us in designing to get inside view of it more clearly.

@BhargavaAnurag

3 жыл бұрын

It's my pleasure

Thank you very much. A very clear explanation.

@BhargavaAnurag

Жыл бұрын

Glad it was helpful!

Thank you for this video Sir. I am working on the design of power amplifier and this video will help me to complete my project .

@BhargavaAnurag

3 жыл бұрын

Best of luck

@jasonleandro412

3 жыл бұрын

Pro trick : watch series on Flixzone. Me and my gf have been using them for watching loads of movies recently.

@jacobyrex6035

3 жыл бұрын

@Jason Leandro Yea, have been watching on flixzone} for months myself =)

Very useful...thanks for your effort

@BhargavaAnurag

2 жыл бұрын

You are most welcome

Excellent explanation and a enjoyable one.

@BhargavaAnurag

Ай бұрын

Glad you enjoyed it!

Excellent Explanation. Probably the agenda could be extended to include Multistage PA Design.

@BhargavaAnurag

3 жыл бұрын

Hi Ravi, Its not in my to-do list as of now but will see if I can do something like that in future. I am not sure if multi-stage PA design is going to be too difficult as long as you can manage 1 stage properly and we just need to keep extending the concept and take care of inter-stage matching. Any special thing bothering you in multi-stage PA design?

Great.....❤️was waiting for this video...since I subscribed you👍🙏

@BhargavaAnurag

3 жыл бұрын

Thank you so much...I hope you got some learning by watching the Part1, real fun is yet to come...😀

@ashishmesa

3 жыл бұрын

@@BhargavaAnurag Yes definitely....I know this is just a trailer...just waiting for the movie with seat belt tied🙏🙏

Thank you very much for your videos Sir. I want to experiment with building my own rf amplifier for hf and vhf

@BhargavaAnurag

3 жыл бұрын

Go for it....👍

Thank you

@BhargavaAnurag

9 ай бұрын

You're welcome

You are helping us a lot Sir, I request you to kindly make a video on designing of Doherty Power Amplifiers possibly class -AB for carrier and class-C for peaking

@BhargavaAnurag

2 жыл бұрын

Will try...👍

@amitkumar-qw9fz

2 жыл бұрын

Sir please put video on it as early as possible. I'm trying to design it but not able to get it. Love you sir and waiting for it.....

Thanks for the tutorial Dr Anurag! They were extremely helpful. I have a question though. In real life, will the ZL you obtained from loadpull, which is 28+j0.5 be in parallel with the 50 ohms of the antenna? Or does the matching network transform the 50 ohms of the antenna to look like 28+j0.5 ohms? Thanks again and looking forward to new videos! :)

@BhargavaAnurag

2 жыл бұрын

Hi Mohd., ZL is the impedance that we need to present to the PA device in order to extract either the max power or best efficiency etc. The matching network transforms the actual load impedance which could be either a 50ohm or the Antenna's input impedance so that efficient power transfer can happen between the circuits.

Hello Sir, Your video tutorial sessions are very useful and informative. I have learnt a lot about practical circuit design from all your sessions for which I am very grateful to you. May I seek suggestion regarding the transistor stability. Is it necessary that we need to check stability factor over a wide frequency range i.e. from say, 1Hz till Fmax or just around the PA operating frequency range?

@BhargavaAnurag

2 жыл бұрын

Hi Devi, It is not mandatory to check stability for wide freq range but it does give you advantage in terms of not to worry about oscillations at any frequency and that is called unconditional stability condition and this is how I prefer to design. You can proceed by stabilizing transistor only in your desired band of interest and this is called conditional stability condition, if you proceed with this option then I would advice to keep checking for load and source stability circles in every step of your design.

Your design series are perfect, I have watched all so many times. Why the GaN devices are common used in 3dB compression? It has less non linearities in further compression than other transistors?

@BhargavaAnurag

3 жыл бұрын

Hi Andre, GaN usually have a good linearity past P1dB point compared to other devices like LDMOS hence it is preferred to use 3dB as the preferred compression point which is kind of Psat point for other devices and by operating here you can also get better PAE performance. Hope this helps....

@andremuriloschlindwein9801

3 жыл бұрын

@@BhargavaAnurag Helped a lot, thank you!

Please do a design on a VCO for 28 to 40 GHz frequency

Thank you sir. You are doing a wonderful job and blessed to have you but sir we don't have the access to the workspace of Andy Howard you provided in the previous video so it would be helpful if you can provide access or give us any other alternative

@BhargavaAnurag

3 жыл бұрын

If you have legal copy or an evaluation license of ADS then you can register at Keysight Knowledge Center using the HOSTID of your license file and download needed examples etc easily with the links provided.

Thank you sir for this amazing work. I am working on the BJT PA and its bias on base is usually current, How can I process the DCIV data like the template in the video? for example, the gain in template is calculated using gate voltage V1, but it is current in my BJT DCIV design

@BhargavaAnurag

2 жыл бұрын

Hi, You can use the BJT curve tracer template from the Insert->Template menu

Hello Sir, The video was just what I needed to better understand the topic and I am very grateful to have found it. Thank you again for sharing your knowledge and for helping people like me learn and grow in different areas. I will definitely be keeping an eye on your content in the future. I would like to have access to the workspace but I don't know how to download it, I have the ADS model of the wolfspeed transistor CGH40010F. thank you.

@BhargavaAnurag

Жыл бұрын

If you are a supported Keysight customer, you can create a Knowledge Center account and download the workspace.

@Dribble_Dynasty_DENM

4 ай бұрын

thank you very much Sir @@BhargavaAnurag

Very useful, Can you make video on Doherty Amplifier Design

Hi Sir Thank you so much for your wonderful tutorial. The way of your explanation is very clear. In this tutorial you mentioned that the 5 ohm resistor is used to stabilize the GaN device used in this demo which is taken from the datasheet . Can you please explain how to design stability network for any transistor with an example demo if the element values of stability network are not mentioned in data sheet sir. waiting for your reply. Thank you sir.

@BhargavaAnurag

3 жыл бұрын

If it is not there then you can play with the resistor value and look at the stability and gain together to find the right combination.

@sridharnagisetty7068

3 жыл бұрын

@@BhargavaAnurag Thank you for your quick reply sir. So you mean that we need to vary the value of resistor by just trial & error and check for the stability factor? But in your Tutorial-38: Harmonic Balance Simulations you used a stabilization network that includes a series RLC branch in parallel with series gate resistance for demo_fet -2 device. Can you please explain how you chose the values of that stabilization network sir. Thank you sir. Waiting for your reply.

I do thank for these tutorials. And I would like to know what should I do when I cant find transistor model in ADS library file such as RD01mus2.

@BhargavaAnurag

2 жыл бұрын

Best way is to contact the device vendor to get proper model for the specific software. Some vendors may offer nonlinear model and some only provide S-Parameters for specific devices.

17:00 Hi Dr. Anurag, can you share some light on those decoupling/bypass capacitors? Where could I read more about them and their influence on power amplifiers?

Thank you sir for this amazing work. Do you know how to obtain by manual calculations the values ​​of the source and load impedances mentioned in the datasheet and their real meaning please?

@BhargavaAnurag

3 жыл бұрын

Hi Paula, I don't know of any method of calculating these impedances manually as you don't know anything about the transistor, you either need to know complete equivalent circuit of these devices which is not possible as no vendor would expose it, or you need to multiple measurements which are not always easy. Easiest way is to perform simulation to find out the relevant parameters.

Thank so much sir for these tutorials.I have a question. In stability analysis , I am designing a device operating at higher frequency like 11 GHz and I want device to stable from 2GHz onwards. So for that I am using a 10 Ohm resistor. But this leads to drastical reduction in efficiency . So how can I improve the efficiency?

@BhargavaAnurag

2 жыл бұрын

Efficiency can be improved when you do the Load/Source Pull and select the appropriate point as per your need. You need to be little more careful about gain while stabilizing the device. Achieving broadband stability depends on the device characteristics, some devices are easily stabilized and some are not.

Thank you so much. I'm simulating the frequency characteristic of MRF8S18120 but I can't find it in libraries. I look forward to your help.

@BhargavaAnurag

Жыл бұрын

Its a NXP part so you will need to contact NXP or look at their website to download the ADS Design Kit.

The initial theory part and discussions make it a complete package indeed. However, I didn't understand "GaN device provides higher impedance so it is easier to match with system impedance (unlike GaAs)" -- could you please elaborate a little?

@BhargavaAnurag

3 жыл бұрын

GaN is a higher bandgap devices hence offer little gate and drain resistance as compared to LDMOS or GaAs hence easier to match with 50Ohms.

Great tutorial Sir, thanks much. Do you have a tutorial on Doherty PA plesae?

@BhargavaAnurag

3 жыл бұрын

Sorry, no

Hi Anurag, for a max PAE design, do I have to take the complex conjugate of the source impedance like in the max power design?. Thanks for this great tutorial.

@BhargavaAnurag

3 жыл бұрын

Hi Jorge, If you are referring to the impedance shown in the loadpull data display template then yes.

@jorgejimenez8602

3 жыл бұрын

@@BhargavaAnurag Thank you so much!

Could you also make some videos about I/O/interstage matching using center-tapped transformers?

@BhargavaAnurag

3 жыл бұрын

Unfortunately, I don't have great knowledge in that so can't help much....😒

Hello Mr Bhargava! This video is really useful, there are a lot of short and unuseful videios on KZread, but this one is awesome. As now the Cree company (Wolfspeed) sold it's RF part to the MACOM I can not obtain the models and I have only S-parameters. Is there any possibilitys you to share with nonlinear models of this transistor?

@BhargavaAnurag

5 ай бұрын

I can't share the models as those are obtained under agreement with Cree/Wolfspeed. You can register at this new MACOM portal to get access to models that you can download: www.macom.com/rfproducts/rf-portal Make sure you use your company/college mail id as generic ones like yahoo, gmail won't be allowed.

Thank you, Anurag for your insights. I have requested the keysight ADS design kit to CREE by filling the form but I have not received it yet. Can you suggest me what to do ?

@BhargavaAnurag

2 ай бұрын

You will need to contact your local MACOM distributor regarding the same.

sir, how can we download cree vendor library which you have shown in the video to get the GAN transistor.?

@BhargavaAnurag

3 жыл бұрын

www.wolfspeed.com/rf/tools-and-support/request-access-to-wolfspeed-rf-portal/

Hello Anurag, Great tutorial. A quick question, You are not selecting the Number of fingers and width of the transistor here. Can you explain on how the fingers and width will vary ? how do we select the fingers and width? on what basis.

@BhargavaAnurag

3 жыл бұрын

Fingers and width is not valid as it is package transistor for 10W applications. You do those kind of things when you deal with IC designs and it is dependent on the power density per finger as recommended by foundry for specific processes.

@amithgani

3 жыл бұрын

@@BhargavaAnurag thank you Anurag.

Hello sir, thank you for these great tutorials. Can you plz tell something about stability circles. What if k factor is greater than 1 but stability circles are completely inside the smith chart. What does this indicate? I am not using NWA or templates for stability as you described rather i am plotting stability circles using palletes in simulation S- parameter. As i know that these circles should b out of the smith chart for unconditional stability...

@BhargavaAnurag

2 жыл бұрын

Something doesn't seem right based on what you described. Kindly contact your local tech support team to take a closer look at your setup.

Thank you so much for such a detailed tutorial. I have one small question if i were to design a PA with a NPN transistor will the procedure remain the same?

@BhargavaAnurag

Жыл бұрын

Largely yes..but Biasing etc will change but PA design concept will largely remain the same.

@meghanahulikal7048

Жыл бұрын

Thank you!! 😊

thank you for this tutorial, it is very beneficial. my question is how can I apply these notions and principles on a circuit of cmos transistors like the figure below (use a basic transistors nmos+pmos to build a PA not a model like CGH400010)

@BhargavaAnurag

Жыл бұрын

CMOS kind of designs requires slightly different implementation notions but basic PA fundamentals will remain same.

@khalfallahcherifi3535

Жыл бұрын

@@BhargavaAnurag thank you very much

Hello sir, thank you for the detailed tutorial . Can you share the equations which allows to have the results of the first part ?

@BhargavaAnurag

Жыл бұрын

Yoiu can download the entire workspace from the Keysight Knowledge Center using the link provided

Hi, I wanted to know how circuits can be imported onto latex or presentation or if there's a way to get out a clear schematic graphic file in a jpeg, png format.

@BhargavaAnurag

3 жыл бұрын

Hi, I always use Snipping Tool offered by default in Win10 PCs and it works best as per my experience. To increase the quality & clarity, I would typically go to Options->Preferences->Display tab and make the schematic background to be White instead of default off-white and that helps. Also, if you want you can switch off the Grid dots for plan background. Hope this helps...

@bios546

3 жыл бұрын

@@BhargavaAnurag thanks so much! This helps a lot.

Much thanks for these tutorials,could you share the project , Many thanks

@BhargavaAnurag

Жыл бұрын

You can download the workspace from Keysight Knowledge Center (login required): edadocs.software.keysight.com/pages/viewpage.action?spaceKey=eesofkcads&title=Tutorial%3A+Power+Amplifier+Design+in+ADS

could you do a video about how to model your own nonlinear model of transistor please

@BhargavaAnurag

3 жыл бұрын

Hi Itteogo, That is not an easy topic and any nonlinear modeling is a very involved activity where you need pretty elaborative hardware measurement setup as well as device modeling software such as ICCAP. You can google for ICCAP device modeling and you would find good resources for help.

Hello sir, I am working on the design of class E-power amplifier. I request you that in next video if you can briefly explain how to do load pull analysis on class E-PA. I will apricate that Thank you

@BhargavaAnurag

3 жыл бұрын

If you have legal copy of ADS then please register at Knowledge Center and you can get an example of Class-E PA: edadocs.software.keysight.com/pages/viewpage.action?pageId=17314656

@gursewakghuman2790

3 жыл бұрын

Thank you sir for replying to my comment I really appreciate it I will try it. Your tutorial are excellent

Hi!, thank you for this usefull tutorial, yet i have a quastion, i downloaded the Matthew Ozalas archive file, and i saved his data display window as a Template, but when i did the FET_curve_tracer test for a transistor from my library the template didnt work (not displaying the signal), so how did you made it working for you?!

@BhargavaAnurag

2 жыл бұрын

You need to focus on the Wire Labels as the default template might use different name than what is expected in Matt's template. Hope this will resolve the issue for you. If you have access to Keysight Knowledge Center then you can download the complete PA workspace, that way you can directly look at my design.

@bugrahan1946

2 жыл бұрын

@@BhargavaAnurag can you share the direct link of your workspace in Keysight Knowledge Center? I could not find it in the Keysight Knowledge Center.

@BhargavaAnurag

2 жыл бұрын

@@bugrahan1946 Here is the link: edadocs.software.keysight.com/display/eesofkcads/Tutorial%3A+Power+Amplifier+Design+in+ADS

@aparnadr2189

2 жыл бұрын

@@BhargavaAnurag Is this link still available for those who have KC access?

Don't we have to verify the S parameters we get through non linear model with that of linear model? As in from datasheet?

@BhargavaAnurag

3 жыл бұрын

You don't need to (but surely you can if you want to) as long as you are seeing similar gain on exactly the same bias conditions. The S-Par from non-linear model and what's there in the datasheet will never match 1:1 as during device modeling things will be slightly different than what you measure on bench so as long as you are in near about zone you should be fine.

@kapilgavali

3 жыл бұрын

@@BhargavaAnurag ok

Thankyou sir. You have made such a nice videos but many times you have used the Templates which is not directly available in ads can you share your work space Or project files

@BhargavaAnurag

3 жыл бұрын

Links to the workspace containing the templates I used are provided in the description box. Also, if you are a supported Keysight customer, you can download the PA design workspace from Knowledge Center: edadocs.software.keysight.com/pages/viewpage.action?spaceKey=eesofkcads&title=Tutorial%3A+Power+Amplifier+Design+in+ADS

@Anurag Bhargava Dear Sir, I have tried the PA design using CGH40010F by following your tutorials Thank you so much for providing them. But as I need to design my PA using silterra NMOS HP model,I kindly request you to let me know is it possible to download either SilTerra NMOS device models (or) TSMC NMOS Models as like CREE GaN device model from wolfspeed. If So can you please provide me the link as you provided for CREE GaN device models.It will be a great help for my research work. when I tried using Devices _MOS in ADS it is showing the error as Undefined model.Can you please let me know how can make use of these default MOSFET models available in Devices _MOS in ADS .Thank you so much Sir.Waiting for your reply.

In the last section of video when I try to put the same impedance and those meas eqn, in the output for Vload I'm not getting same value. It is not taking meas eqn while simulating. What should I do. Please help. I'm using the same device as yours

@BhargavaAnurag

Жыл бұрын

If you are doing everything same as mine then result should be same but sometimes if you are using different PDK version for the transistors then few settings on the device might be slightly different. Recheck everything and take help from your local Keysight support team if you can't figure out the issue on your own.

Hello Anurag, is it important to learn the LANs (9/10) video's before PA (16/17/18) , ot I can go to PA W/o LNA video's? thank you

@BhargavaAnurag

Жыл бұрын

Hi, Both of those videos are independent and there is no requirement to watch LNA videos before PA but more you watch more you learn....😊

Good day! Many thanks for your work! How can get ADS workspace ? I do not have KC login. Thanks!

@BhargavaAnurag

Жыл бұрын

Hi, Currently it is only available via KC portal. If you are a supported Keysight customer then you can always create a KC login and download the workspace.

Hello Anurag, I want to ask a simple question. What is the main purpose of using directly the transistor rather than using packaged amplifiers with nearly same specs ? why we should choose a transistor part from wolfspeed rather than ready made amplifier IC from analog dev for ex ? Thanks.

@BhargavaAnurag

Жыл бұрын

If you are already getting readymade or internally matched amplifier directly suiting to your specifications then you can use it but it is not always possible to find such amplifiers and in those cases you will need to design your own amplifier using the basic transistor device and that is what this video is explaining.

@hkn308

Жыл бұрын

@@BhargavaAnurag thank you for the reply.. loving your videos. 👏

Sorry to bother, sir. When i try to build the class E PA, can i still use the Vds as 28v and Vgs bias voltage as -2.7v. Looking forward your videos for switchmode PA, thanks for your efforts, really helps a lot!

@BhargavaAnurag

2 жыл бұрын

Hi Louis, You will need to select other bias point if you wish to use the device for switched mode PA and you could do it easily looking the DC characteristics.

Sir, I've done this process for the same device in the same way you've shown in this video. But I've selected the center frequency as 852MHz. and my load pull simulation shows half contours rather than full contours. and it showing the max PAE as 35% and max output power 39dBm and corresponding load and source impedances for that max PAE and max output power. Is it correct? can I continue further with the part 2 of this video?

@BhargavaAnurag

3 жыл бұрын

half contours typically means you haven't taken enough area for loadpull or you haven't selected the right center point in Smith Chart. You may need to try out few zones before finalizing one.

what does CGH40010 model no represent?

@BhargavaAnurag

3 жыл бұрын

Hi, Its a part number for a specific GaN device from Cree/Wolfspeed. If you want to know what this name signifies then contact Cree for more details.

sir ,what is the node technology of that amplifier(CGH40010F)

@BhargavaAnurag

6 ай бұрын

CGH40010F is a GaN based transistor. New series or 2nd generation part is CG2H40010

hello sir ihave downloaded the templte file of VI characteristics from your college youtube website, extract files but from ADS design kit i am not finding that file in the folder where i extract the templte even change the extension to RAR..??

@BhargavaAnurag

2 жыл бұрын

You need to unarchive the file from ADS Main Window->File->Unarchive option. Please watch all the videos under Learn ADS in 5mins playlist so that all the fundamentals are cleared.

@Anurag Bhargava Thank you for your quick reply sir. So you mean that we need to vary the value of resistor by just trial & error and check for the stability factor? But in your Tutorial-38: Harmonic Balance Simulations you used a stabilization network that includes a series RLC branch in parallel with series gate resistance for demo_fet -2 device. Can you please explain how you chose the values of that stabilization network sir. Thank you sir. Waiting for your reply

@BhargavaAnurag

3 жыл бұрын

Hi Sridhar, Stabilization network topology will change based on the type of circuit you are designing, implementation methodology etc but in nutshell its either all of RLC or RC or just R alone. Also, typically in RF PCB kind of design I recommend to avoid RLC feedback kind of topology as it will suck up lot of gain but in MMIC its a good topology as you can always add 1 more gain stage to recover the gain and achieve broadband response. When you design LNA, stabilization network usually is preferred on output side so that you don't distort Noise Figure and in PAs you prefer input side to avoid handling higher power and suck up the gain offered by device too much. Once you have the tool in your hand, play with all topologies and see what works best for you as sometimes you have a straight answer to these questions unless you give it a try. Whenever playing with these networks you need to work in iteration and finalize a specific component values and toplogy. Hope this helps in some manner.

@sridharnagisetty7068

3 жыл бұрын

@@BhargavaAnurag Got it Sir. Thank you.

@sridharnagisetty7068

3 жыл бұрын

@@BhargavaAnurag Dear Sir, I have tried the PA design using CGH40010F by following your tutorials Thank you so much for providing them. But as I need to design my PA using silterra NMOS HP model,I kindly request you to let me know is it possible to download either SilTerra NMOS device models (or) TSMC NMOS Models as like CREE GaN device model from wolfspeed. If So can you please provide me the link as you provided for CREE GaN device models.It will be a great help for my research work. when I tried using Devices _MOS in ADS it is showing the error as Undefined model.Can you please let me know how can make use of these default MOSFET models available in Devices _MOS in ADS .Thank you so much Sir.Waiting for your reply.

Sir, how to efficiently copy the simulation result data equations from one workspace to another workspace?

@BhargavaAnurag

2 жыл бұрын

The way I use is to simply create a Data Display Template and then you can use it in any workspace you want. Only restriction is to have same variable & node names for which you wrote the original equation else the relevant equations will show an error...😊 You can watch the relevant video under Learn ADS in 5mins playlist for more details.

Thanks for the amazing tutorial. I wanted to design an amplifier using Cree’s CGH60015D GaN HEMT bare-die model, can you provide me with the s2p file for this?

@BhargavaAnurag

2 жыл бұрын

You can do much with S2P file if you want to do a PA design. It is better to contact Cree or other device vendor and get the proper nonlinear model for the transistor.

sir how to find the technology node in RF transistors, like 90nm, 45nm and so on?

@BhargavaAnurag

3 жыл бұрын

Sometimes this kind of details are mentioned in the datasheet but if this is not mentioned explicitly then I am not aware of any method to find that out and only transistor vendor can provide such info. Also, I am not even sure why finding out that detail would help in your design? You can characterize the specific device for parameters like fT and rest of the performance parameters and that would tell whether its the right device for your application or not.

In the DCIV simulation, Why was Vgs only swept up to -2V and not more than that like -1V?

@BhargavaAnurag

7 ай бұрын

It depends on what's Id you are looking for. You can sweep it to the point wherever you want provided its supported by the non-linear model

Sir why we are using pretty high drain bias voltage? is that value matches with current technology???

@BhargavaAnurag

Жыл бұрын

drain voltage is selected as per the transistor/technology you are using. the transistor used in the tutorial is a 28V GaN device.

@eeengineers3958

Жыл бұрын

@@BhargavaAnurag okay

shown frequencies against ZL and Zs in data sheet in in MHz?

@BhargavaAnurag

9 ай бұрын

There is nothing wrong in writing MHz, e.g., something can be written as 1600 MHz or 1.6 GHz, its one and the same

Sir I'm from srilanka. How can I obtain a cree transistor for the 800MHz to 900MHz RF signal power amplifier design. Should I want to order it online or can I purchase it in electronic shop or something?

@BhargavaAnurag

3 жыл бұрын

Kindly visit the Cree website and look for answers. They should have a distributor who would sell parts to your country. There are other options as Qorvo, NXP, Infineon etc as well.

@user-nt4nm4fb3u

3 жыл бұрын

@@BhargavaAnurag Thank you sir...

Hi Anurag, I am trying to follow through these steps using the S2P files given from Macom for CG2H40010. Can you please throw more light on the effect of using S2P files to design PAs. I have tried simulating using the file but getting a PAE of -0.092. Is it possible to use S2P files or I will need a non-linear model of the transistor?

@BhargavaAnurag

2 ай бұрын

Unfortunately you can't go very far with S2P file as it is only linear S-parameter data. Try to obtain the non-linear model of the device for proper simulations.

@mfonuko7420

2 ай бұрын

Thanks for the feedback. I'll contact the team for the non linear model.

Hi Anurag , Thanks for sharing your knowledge . I am using CG2h40010 device is my simulation .By default in cree library rth=85 (?????!!!!!!!!) .It must be incorrect . I checked in datasheet it is 7.83 which is lower than CGH40010 device . For rth =85 , i am not getting gain more than 8dB in Load pull. Shall I change the rth =8 ? What will be effect of rth parameter in actual hardware design ?

@BhargavaAnurag

Жыл бұрын

I would advice to check this with Cree tech support team.

@abhayshekhar7147

Жыл бұрын

@@BhargavaAnurag thank you

Hello Sir. I new this topic. Which book can I start to understand behind theory of this topic.

@BhargavaAnurag

Жыл бұрын

Hi, There are plenty of good books like Pozar etc. For more recent books, try google

Hi, I would like to know about the MAXIMUM DRAIN CURRENT which is mentioned in the DataSheet. Is it DC / AC / AC rms ? Thank you !

@BhargavaAnurag

Жыл бұрын

Hi Yehuda, In almost all cases it will be DC current rating.

@yehudanagosi

Жыл бұрын

@@BhargavaAnurag Thank you !!

to get that transistor,ow long will it take for them to respond

@BhargavaAnurag

3 жыл бұрын

Hi Alagu, I am not sure as they are different company. If you are not getting proper response from Cree then you can approach other vendors like NXP, Qorvo etc

@tekathegreat

3 жыл бұрын

if you got the zip file of cgh40010 for ADS , please share me?

From where can I get the device model as the link described below is not working.

@BhargavaAnurag

2 жыл бұрын

Kindly contact Cree/Wolfspeed to obtain the library. You can use other vendors like MACOM, Qorvo etc as well.

Hello sir. Do you have tutorial to design GSM transceivers at 1800Mhz by using ads?

@BhargavaAnurag

3 жыл бұрын

No, I don't have any tutorial specific to that topic but you could proceed with basic knowledge depending upon what level of design you wish to perform. If it is only system level then check out SystemVue tutorial on my channel.

@premkumar-rn5bp

3 жыл бұрын

@@BhargavaAnurag is it possible to find spurious free region using WHATIF tool if rf blocks are in series ex(super het receiver)

Hello Anurag Sir, I am unable to use the DC bias template as in Matt's Design. I have labelled the wires exactly as he has done but I see blank in my data display window and errors in the equation page. I have knowledge centre access but am not able to access your workspace either. Could you please suggest what can be done? Thanks in Advance.

@BhargavaAnurag

2 жыл бұрын

Hi Aparna, I am not sure what issue you are seeing in downloading the workspace from KC if you have access. Could you please contact your local tech support team for help.

@aparnadr2189

2 жыл бұрын

@@BhargavaAnurag Many thanks Sir, have done that.

Thank you, Doctor, but I cannot download the workspace. When I click on the link below this video, this phrase appears (You Do Not Have Permission To View This Page)

@BhargavaAnurag

2 ай бұрын

You need to be a supported customer. If so, create Knowledge Center account with your license HOSTID to get full access to the portal.

@3:04 Is that you Scuba diving?!

@BhargavaAnurag

3 жыл бұрын

No.....that is not me...😜

Can you provide the template for last step you used for impedance matching.

@BhargavaAnurag

2 жыл бұрын

Its all available in the PA Workspace that is uploaded on the Keysight Knowledge Center.

Sir can we able to get the simulation files of yours?

@BhargavaAnurag

3 жыл бұрын

Hi Prasanna, That will defeat the whole purpose of the tutorial. You will need to do it yourself to learn the techniques shown in the video.

I still dont understand how you managed to get the template to run on the FET trace simulation.

@BhargavaAnurag

4 ай бұрын

If you are a supported Keysight customer, you can download the PA workspace that contains the required template for your use

Sir, in my personal amplifier design, I encountered a problem, Wolfspeed GaN HEMT CGHV1F006S is a 6 port transistor, how to deal with this device, appreciate it if you can give me some hint.

@BhargavaAnurag

2 жыл бұрын

You can contact Cree or read the datasheet to understand what those 6 pins are and set up the simulation accordingly.

@hejoshua4170

2 жыл бұрын

@@BhargavaAnurag will try, thx for your quick reply!

I was wondering if there are chances for ADS to become Linux compatible in the future.

@BhargavaAnurag

3 жыл бұрын

Hi, ADS has always been compatible to Linux as well as Windows. You can download the Linux installer from the Keysight website and start using it....

@bios546

3 жыл бұрын

@@BhargavaAnurag woah thanks. I'll check it out.

Hello sir, thank you for the tutorial I have a question: are you using class ab power amplifier with only one fet? As i know, class ab need 2 trans pnp and npn. I'm confused. Pls help. Thank you.

@BhargavaAnurag

2 жыл бұрын

Class AB doesn't require 2 transistors. Class AB is determined by conduction angle which can be selected with proper bias point and thats what I have done here.

@nguyenkiet8153

2 жыл бұрын

@@BhargavaAnurag thank you sir. I wonder if i want to change to class a amp with your design. What should i do?

@BhargavaAnurag

2 жыл бұрын

@@nguyenkiet8153 You can simply change the bias point to something like Idss/2

Hello sir, I have a doubt, will the ads model provided by Cree, include the package parasitics or is it an ideal model without considering any package parasitics. Thanks

@BhargavaAnurag

Жыл бұрын

Hi Dinesh, Usually for devices like Cree transistor, the device model will include the package parasitics.

@rddinesh0405

Жыл бұрын

@@BhargavaAnurag so idi and vdsi are intrinsic drain voltage and current excluding the parasitics. Am I right sir? Actually i used the de-embed network and mirror of de-embed network to obtain the same and your trick is a time saver thanks

Sir I've downloaded your colleague's data display template. Now the question is how can I use it for my circuit? Can you help me with that...

@BhargavaAnurag

3 жыл бұрын

Kindly check the video on how to create templates here: kzread.info/dash/bejne/qXdms8mYYM2sqKw.html The file you downloaded is not a data display template, its a full workspace with .7zads extension, you first need to unarchive it using File->Unarchive option in ADS Main window and once it is unarchived and opened, you go to the desired schematic and save it as a template and same thing you need to do with respective Data Display page. Once they are saved as templates you can go to your actual workspace where you want to use, simply insert the schematic template, replace the device with your transistor model, set your voltage ranges run simulation and you will get a blank data display window and now here you can use Insert->Template to select the saved data display.

Sir, to bias the Cree CGH40025 model at Class-C mode, the Vgs is set -4 V and above (like -5 and -6 V), nevertheless the Cree transistor outputs no power, how can I solve this problem, thx a lot.

@BhargavaAnurag

Жыл бұрын

Pls contact Keysight tech support team for help

Sir acutully i am designing power amplifier with BJT Shall i follow the same process for designing

@BhargavaAnurag

10 күн бұрын

Hi, Yes, the process will be quite similar for BJT but simulation technique will need to be adopted as FET and BJT biasing is little different but the amplification principle remains the same.

Hello sir, can i used this transistor CGH40010 to design class E power amplifier???

@BhargavaAnurag

3 жыл бұрын

Yes you can

@zaramlslamalislam4614

3 жыл бұрын

@@BhargavaAnurag sir when I disgen class E power amplifier are steps different (vary) or not ??? Thanks sir

@BhargavaAnurag

3 жыл бұрын

@@zaramlslamalislam4614 Yes,, it will vary as the operating point criteria will change. I will Class-E in the future but not immediately.

Thanks for your video. Can you share cree library? I am having problem adding cree library to ads

@BhargavaAnurag

3 жыл бұрын

Unfortunately no, library is provided under NDA and it can't be shared. If you already have the library and facing some trouble then kindly contact local Keysight tech support team for help.

@thinhvu7919

3 жыл бұрын

@@BhargavaAnurag So can I replace it with FET RF3931 from RFMD?

@BhargavaAnurag

3 жыл бұрын

@@thinhvu7919 Sure, you can use any device and the process shown in the video will remain the same.

@thinhvu7919

3 жыл бұрын

@@BhargavaAnurag in step 5, i tried to simulate myself the way you share. But when running the simulation, the results are not the same. Please explain to me

@thinhvu7919

3 жыл бұрын

specifically in step5 I have the problem "Unable to resolve variable (s) or functions (s) in expression` Pdel_dBm = 10 * log (Pdel_W) +30 '"and so on with other variables like LS_Gain_dB, PAE ,Pdel_W etc

Hello sir.....the tutorial is very helpful....however, I want know where can I get those equations to plot the graph as mentioned in 22:38

@BhargavaAnurag

Жыл бұрын

You can download the workspace using the links provided in the video description and you will have access to everything mentioned in the video.

How do I choose z center 1 and z center 2 for the device you are using in this tutorial. So that I can get required data points for further processing.

@BhargavaAnurag

2 жыл бұрын

You can download the Graphical Load Pull templates from the Keysight Knowledge Center. Location of z1, z2 can be decided by you based on the transistor. Also, it is not necessary to use both z1,z2 in all cases and you have the flexibility to ignore 2nd if not needed.

@ummehabiba-ef6jh

2 жыл бұрын

@@BhargavaAnurag Thankyou for your time and consideration. But what if I don't have z1 corresponding to my dc biasing condition as they are different on datasheet and mine are different and also not on may frequency. Can I then use the zloads from basic loadpulls. Moreover, If I can use them then which one I have to use because one is for maximum gain and power and other is for maximum pae.

@BhargavaAnurag

2 жыл бұрын

Please contact your local Keysight tech support to get help. Its difficult to teach all this on KZread

@ummehabiba-ef6jh

2 жыл бұрын

@@BhargavaAnuragThankyou sir for this much help.

Sir can you please tell from where to download the library files that i can include and use in my design? Actually the link you provided is not working.

@BhargavaAnurag

Жыл бұрын

Please contact Cree/Wolfspeed to get the ADS PDK

@user-ng2qy5pe4b

Жыл бұрын

@@BhargavaAnurag Ok thank you sir I got the models. Now can you please tell me the definitions of V1 and V2. From where they came?

Hi Anurag sir, I am trying to access Cree portal to download a GaN device for my design but RF portal login webpage is not working. Do you have any news about it?

@BhargavaAnurag

7 ай бұрын

Cree/Wolfspeed is acquired by MACOM now so there might temporary glitch on their website. Kindly contact their local supplier for clarifications.

I don't own ADS does that mean I can't download the data display to see the equations? I just want to learn.

@BhargavaAnurag

Жыл бұрын

Hi Robert, To open data display you would need to have ADS.

@robr8554

Жыл бұрын

@@BhargavaAnurag Yes the web pages ask for ADS license or something related to ADS. I don't own a license.

Cree link seems to be a dead end. is the download a free tool?

@BhargavaAnurag

2 жыл бұрын

Hi David, Cree offer their library for free but it has to be approved. When you apply for access, make sure to write your full first and last name as well as provide Company details without acronyms etc. Once you have the approval you can download the library. If you still face the issue then you can use equivalent parts from Qorvo or MACOM etc...

Please explain the expressions in step 5 are not working

@BhargavaAnurag

2 жыл бұрын

Kindly take help from your local tech support team on this

Hello Sir, Thank you for this tutorial... I simulate same circuit for Same impedance for maximum power. But after this I am not getting same result as you... After power amplifier circuit simulation... Why sir? Please help

@BhargavaAnurag

2 жыл бұрын

Hi Yash, Its difficult to see what you have done. If you have done everything as I have shown and using exactly the same PDK/Component then results should be same. You can please contact Keysight tech support for more help.

@songswithsubtitlescoltd.6484

2 жыл бұрын

@@BhargavaAnurag Sir from where i am able to download cree wolfspeed vendor kit ?? please give me website link or download link ???

@sushmithang1805

Жыл бұрын

Hi. Were u able to rectify the problem?

Hello sir, 1. I'm able to access vdsi but unable to access idi. What can be possible reason? 2. My efficiency calculation was based on vdsi and idi waveforms(Power dissipated will be decided by overlap between these waveforms). So I get efficiency in simulation But what about measurement how can I measure efficiency once my circuit got fabricated? because now i can't access vdsi and idi anymore

@BhargavaAnurag

Жыл бұрын

If you are not seeing intrinsic current and voltages then it is possible that your vendor hasn't exposed those values. If it is specific to Cree, I know that in one of the versions they didn't expose but the latest version of their PDK should have those values exposed so try the latest version of the PDK and you should be fine.

When I try to see IV curve on AWR, the result is different than you had on ADS. I am %100 sure that I am using the same transistor. Why can it happend?

@BhargavaAnurag

10 күн бұрын

Can't comment as I don't use AWR

sir, my equations are coming wrong for ideal match condition

@BhargavaAnurag

2 жыл бұрын

Please take help from your local tech support team