Another excellent lesson from my 2nd-favorite EE professor! (sorry, Dr J. D. Kraus will always be my #1) My week is complete! THANK YOU!

@sambenyaakov

2 жыл бұрын

Honored to be second to Dr Kraus🙂

Yes this one is also great! Like the explaining of the two transistors cirrent mirror which is so full of different new insights to learn. These lessons in wich a circuitway is explained are full of lightbulb-lightingup-above-my-head-moments. Great and superusefull lesson, again!

@sambenyaakov

2 жыл бұрын

Hi Rob, thanks again for great overview.

@robson6285

2 жыл бұрын

@@sambenyaakov these lessons in wich you dig deeper into a circuit, explaining the reasons or options for some designchoises, these lessons i find always the most full with tons of knowledge, full with new ways to get insights. Also old things get finally clear while listening to these totally clear explainings. Like that lesson about the inner circuit of the 741, so full of things that were so often usefull i'll never forget anymore. At least for me these are so learnfull, it's a joy to follow. Ow i just wanted to say thanks for all this great teaching from your knowledge wich is so usefull and interesting for us.

Excellent presentation. Thank you.

@sambenyaakov

2 жыл бұрын

Thanks

I am going to work with this. Thank you for the video

@sambenyaakov

2 жыл бұрын

👍

I had to look up DCM, CCM, and BCM since you did not define them. Once I did your talk made sense.

@sambenyaakov

2 жыл бұрын

👍sorry

@user-power_electronics

2 жыл бұрын

DCM discontinuous conduction mode , CCM is Continuous Conduction Mode , BCM is Boundary Conduction Mode . All term related to Current

Thanks Doctor Sam

@sambenyaakov

2 жыл бұрын

🙂🙏

Greetings from China

@sambenyaakov

2 жыл бұрын

Back to you from Israel🙂

Thank you so much ! Prof. Sam Ben-Yaakov.

@sambenyaakov

Жыл бұрын

Thanks

I used LM25180NGUR before. If you don't have the zener diode on the output side, the output can go very high voltage without a load. This causes an issue when production tests the board.

@sambenyaakov

2 жыл бұрын

Good point. Thanks

Thank you for the video. Since the feedback is instantaneous voltage, how would you do the bode plot measurement? Where to insert the stimulus in this case and sense lines?

@sambenyaakov

Ай бұрын

Good point . Never thought about this. An auxiliary sample and hold circuitry (not simple) might solve the problem.

Very good Dr. Sam, we learn a lot from you, I do have a question no related to the subject, is why we can not put large filter at the input of Schmitt trigger inverter , or how can I figure the maximum capacitor value I can use to avoid shoot through for the CMOS inside the Schmitt trigger.

@sambenyaakov

2 жыл бұрын

Thanks . Not sure I follow the questions. You mean an IC Schmitt or one built around an inverter?

@karastom2304

2 жыл бұрын

@@sambenyaakov Hi Dr Sam, I mean IC Schmitt

🙏👍🙏

@sambenyaakov

2 жыл бұрын

🙂🙏

Hi Doctor Sam, A few questions would like to discuss with you 1. Could you please tell me why Ib could set the Ip current, do you have an example? I am confused with that 2. why do we need to use two PMOS or BJT to do that? why I cannot just only use two resistors R1 and R2 in my circuit, without PMOS I still can get the Vs voltage right? 3. In the DCM, the reflect voltage and voltage have a 0.5V error, how do deal with that error? 4. Why MPS's device can just only use two resistors to detect the output voltage and don't need to use transistors.

@johnconrad5487

2 жыл бұрын

read about 'current mirrors'

@sambenyaakov

2 жыл бұрын

Hold on to a forthcoming clarifying video

@rj8528

2 жыл бұрын

@@johnconrad5487 Got it.

@rj8528

2 жыл бұрын

@@sambenyaakov Got it, thanks professor.

How is Vgs same for both the MOSFETs?

@Paxmax

2 жыл бұрын

I would look at them as sort of matched pair, the left one is "controlled" by a constant current source. At start-up the left (and right) side are not conductiing. But the constant current source on left side drags down the voltage of left mosfet gate away from Vin = it will start to conduct at some point. It will not conduct more than 200uA set by current source though. The same gate voltage is applied on right side gate. The Right hand side mosfet will also conduct but it's Vds will vary proportional to the voltage swing it is experiencing due to the primary switching cycle and voltage divider set resistors as it is (automatically on it's own) balancing (or basically locked in by the fixed fixed gate voltage) trying to "match" the left hand side. I hope it helps... it's hard to describe with just text.

@sambenyaakov

2 жыл бұрын

Hold on to a forthcoming clarifying video

Hi, what is DCM and CCM ? Thank you .

@sambenyaakov

2 жыл бұрын

Discontinuous current conduction mod Continuous current conduction mode.