Пікірлер

• 
  @katyayanshukla17369 күн бұрын

  Thanks a lot dude!

• 
  @user-kc9dk9tk7gАй бұрын

  Bravo Daddy 👍

• 
  @user-kc9dk9tk7gАй бұрын

  Good Daddy I Like you 👍

• 
  @jordandelosreyes56563 ай бұрын

  Thank you Professor Parent (or would it still be Professor in this context?)

• 
  @piezero_5674 ай бұрын

  Hello sir, how the term 2AvVin is coming ?...

• 
  @jordandelosreyes56565 ай бұрын

  Review starts at 24:00 for everyone who's taking this class post-COVID

• 
  @AdrianGonzalez-ii7jb7 ай бұрын

  ty

• 
  @PesquisasMultiversos7 ай бұрын

  Hello friend, this software is interesting. I see that you understand stochastic resonance. If you are interested, try listening to the audio of stochastic processes, you will be surprised by the phenomenon of electronic voices. I am developing a stochastic method for this purpose, so far I have not I can understand how it is possible for intelligent voices to emerge from the stochastic process, these voices answer questions and communicate adjustments to equipment.

• 
  @davidwparent8 ай бұрын

  This is hard in that the circuit is all out puts, because it node in general is a state. What I probably did not show is that setting the initial condition is the input.

• 
  @stevematson48088 ай бұрын

  Excellent. But I'm having trouble seeing where the input and output is.

• 
  @dennisallen43808 ай бұрын

  'Promosm' 😍

• 
  @bitsurfer01019 ай бұрын

  Vocal audio is very low.

• 
  @deepgheewala970410 ай бұрын

  Can you please explain how did you plot those graphs on Desmos??

• 
  @davidwparent10 ай бұрын

  Not sure how to help. The code can be seen on the left hand side.

• 
  @davidwparent10 ай бұрын

  The link above has links to the desmos sample files I used.

• 
  @divyangvaidya967510 ай бұрын

  Is this MATLAB used to plot the bode?

• 
  @coltersummers10 ай бұрын

  Really helpful, thanks!

• 
  @davidwparent10 ай бұрын

  Glad it was helpful!

• 
  @JEREMY-vf1ej Жыл бұрын

  useful shortcuts: F2 - component F3 - wire F4 - netname F5 - delete F6 - copy F7 - move F8 - drag (wires move w/ component) F9 - undo shift + F9 - redo T - comments S - SPICE directive G - Ground R - Resistor C - Cap L - Inductor D - Diode V - voltage source Ctrl + R - Rotate Ctrl + E - Mirror Ctrl + L - open error log Space - Zoom to fit

• 
  @user-wu2mo7ou1n Жыл бұрын

  You can continue with you a very necessary theme

• 
  @JEREMY-vf1ej Жыл бұрын

  0:30, could you please explain (or point me to the video) how -tau 'flips u(t - 1) around?

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  @JEREMY-vf1ej Жыл бұрын

  oh I see, because u() acts as a function of tau, not t in this case.

• 
  @ossiebalboa56172 жыл бұрын

  Can a circuit be made where an audio signal of very weak intensity is injected into the noise and it is amplified by SR and made audible?

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  @davidwparent2 жыл бұрын

  Yes, but I am not quite sure how it would sound. I think that if the audio were modulated with AM or FM, this could be used as a detector at the modulation frequency. Recently we were able to show SR being used to detect a sin wave above 10KHz. It seems the limitation is the slew rate of the OPAMP. Of course, faster circuits can be used to implement hysteresis.

• 
  @ossiebalboa56172 жыл бұрын

  Does the Schmidt trigger circuit shown have bandpass , highpass or lowpass properties to the sinewave, or a rather sharp Q factor? Just wondering what the working range of the input sinewave frequency range would be?

• 
  @davidwparent2 жыл бұрын

  @@ossiebalboa5617 I would say band pass, but the Q would be very wide. While it is called a resonator, I am not sure if it has a Q. Research topic?

• 
  @koi_krapfen2 жыл бұрын

  Nice video! Thank you!

• 
  @parthmahesh64332 жыл бұрын

  hi for Vb1/Vb2, how did u get (1+gmRe2a) in the denominator? where is the 1 from? thank you :)

• 
  @dle5112 жыл бұрын

  when you say it can wake up CPU, does it matter if it's in Sleep, Hibernate or even Shut Down state?

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  @davidwparent2 жыл бұрын

  I am not sure of the other terms, but it wakes up from a sleeping state. Shutdown sounds like there is no power to the device.

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  @dle5112 жыл бұрын

  will you show us the capacitive sensing feature some other time professor?

• 
  @davidwparent2 жыл бұрын

  Next video!

• 
  @_AVANISHKUMARGUPTA2 жыл бұрын

  Thanks aton man

• 
  @sig008412 жыл бұрын

  Thanks man

• 
  @weepingwallflower80172 жыл бұрын

  1:05 sounds like, "we use the sampling fairy to.." I should get a life shouldn't I?! btw, i didn't get it and, also, what if the delta is delayed, same thing happens, why tho? i think i'm just too high to get it right now

• 
  @davidwparent2 жыл бұрын

  Yea, It does sound like that. I am saying theory.

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  @dle5112 жыл бұрын

  how old is she if I may ask?

• 
  @davidwparent2 жыл бұрын

  82, She is recovering from some injuries.

• 
  @karolgandecki2162 жыл бұрын

  Excellent

• 
  @RAJIBLOCHANDAS2 жыл бұрын

  Excellent video

• 
  @Sabrinalevy7892 жыл бұрын

  That oyster mushroom looks awesome! And I love that you guys are making empanadas, we eat those all the time in Argentina

• 
  @davidwparent2 жыл бұрын

  How do you make empanadas in Argentina? (My wife makes a Puerto Rican Version.)

• 
  @charleswr83592 жыл бұрын

  In the subthreshold region, gm = Id/mVT where m is the body-effect parameter (it is not the ideality factor n of diode I-V equation). 'm' is defined as the m = Delta(Vg)/Delta(Surface Potential), which may be viewed as the Incremental gate voltage that must be applied in order to produce the incremental change in the surface potential. m = 1.2 - 1.4. We control the surface potential to control the inversion charge. m is like the actual price we pay (i.e., gate voltage) to buy a product (surface potential). The price we pay includes a 20-40% sales tax, LOL (m=1.2 to 1.4)

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  @AJ-fo3hp2 жыл бұрын

  U(m) m=tau-1 -m =-(tau-1)=-tau+1 U(-m) U(-tau+1) U(t-m) U(t-tau+1)

• 
  @irsmedic2 жыл бұрын

  "What would it be if it were ideal?" Allow me to field this question, Dr. Parent. According to a rumor I started, the ideal application is and has always been, of course, a Love Detector. Hot Stuff.

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  @davidwparent2 жыл бұрын

  Here is a love video:kzread.info/dash/bejne/p6R2ksVpYcWddJM.html

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  @davidwparent2 жыл бұрын

  I think you gave me an idea for a final exam question. Systems (create with OPAMPS) can be used to measure skin conductance, or skin temperature, which can can be converted into love. Also, as I had suspected, some love testers are just random number generators.

• 
  @davidhuang38302 жыл бұрын

  What if the delta function is delta(t-3)? How would that change the output of the convolution?

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  @davidwparent2 жыл бұрын

  It just delays the shape by 3 seconds.

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  @amirceballos2 жыл бұрын

  and for mac?

• 
  @davidwparent2 жыл бұрын

  Sorry I do not have a Mac. There is a Mac version, but is better to run a Windows emulator.

• 
  @RobertMartin-ky9xp2 жыл бұрын

  This is a nice animation! Is the python code available?

• 
  @davidwparent2 жыл бұрын

  Here is a link:www.dropbox.com/s/p5bk0ec7s94bmgp/step_conv_step.py?dl=0

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  @davidwparent2 жыл бұрын

  It takes a long time to generate.

• 
  @t1d1002 жыл бұрын

  You got me through a troubleshooting test. Thanks!

• 
  @davidwparent2 жыл бұрын

  Cool, was this for a job?

• 
  @t1d1002 жыл бұрын

  @@davidwparent No, I am a retired and took up electronics as a hobby. The project is a synthesizer. With your information, I gained an understanding of what I should be seeing with the oscilloscope.

• 
  @darshanpurohit76462 жыл бұрын

  Sir my Question is Can we simulate the Reverse Saturation Current(Io) using LabView ?

• 
  @davidwparent2 жыл бұрын

  Labview or in this case Labtracer can collect the data needed to extract Io, and lab view does have calculation capabilities. I would use python with pyvisa to write my own script to do this. The reverse current can be dominated by a shunt resistance that can make it hard to measure Io this way. That is why we do it in the forward direction. PM me if you want some more info.

• 
  @OneCardoso2 жыл бұрын

  Shit video

• 
  @kevinrichardson72652 жыл бұрын

  Great review even after college, thanks Dr. Parent

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  @davidwparent2 жыл бұрын

  Hi Kevin, Thanks!

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  @davidwparent2 жыл бұрын

  Thanks!

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  @kunaldebbarma80863 жыл бұрын

  Why did you include the emitter resistance for the npn in the middle in its small signal analysis model shouldnt that be shorted to gnd because of the bypass capaciter

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  @davidwparent3 жыл бұрын

  Notice that Re2A is not shorted. Only Re2b.

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  @kunaldebbarma80863 жыл бұрын

  @@davidwparent aah yes my bad

• 
  @Ormaaj3 жыл бұрын

  Oh so you _can_ actually put model parameters into those .meas things. That's useful. I figured there must be a way to get the computed KP for various models and it probably had something to do with .meas, which looks like a pretty useless feature otherwise, but never seen an actual example.

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  @m.fatihdinc46753 жыл бұрын

  sir can you send me this word document, I would really appreciate it

• 
  @davidwparent3 жыл бұрын

  Hi , I put a link in the description. Enjoy.

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  @m.fatihdinc46753 жыл бұрын

  @@davidwparent Thank you sir!

• 
  @aspiran20103 жыл бұрын

  An excellent demonstration of SR - many thanks! where is the non-linearity required for SR come from in this case? (I am actually learning about SR and finding it fascinating)

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  @davidwparent3 жыл бұрын

  The system is non-linear in that you can not use superposition to analyze the noise input alone and the sin wave input alone and then sum the two responses together and get the proper response. The noise peak to peak is just large enough to trip the Schmitt trigger back and forth, and the sin wave Vp is set to that it can not trip the Schmitt trigger on its own. If Vp of the sin wave is too big, then it behaves like a normal Schmitt trigger would and you get a 50% duty cycle square wave. It is best seen on a spectrum analyzer. If you see the peak at your target frequency but do not see peaks at the 3rd ,5'th ,7'th .. harmonics, you have stochastic resonance. Google this paper : STOCHASTIC RESONANCE IN A BISTABLE SYSTEM Here is the lab manual:www.dropbox.com/s/mah6ifz30deevz3/summer_bridge.pdf

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  @aspiran20103 жыл бұрын

  @@davidwparent thanks David! Will read the paper. Also I think I need to setup the experiment and see it for myself. Super interesting! Thanks also for the lab instruction.

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  @aspiran20103 жыл бұрын

  @@davidwparent Hi David, massive thanks for the lab manual and these description! I just set up the circuit and really enjoyed seeing it! notably the disappearance of the harmonics in the power spectrum when SR in play is interesting.

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  @davidwparent3 жыл бұрын

  @@aspiran2010 Great, now you can explore how the hysteresis width affects the SNR or what the minimum detectable signal amplitude is.

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  @aspiran20103 жыл бұрын

  @@davidwparent also one quick question, i struggle to understand how the harmonics are gone. is it essentially like a pulse width modulation replicating the sine wave? because the ST is at the end either on or off. it is so fascinating to see the even harmonics are removed while the output is still "digitalised". The closest thing I can think of is PWM. (sorry for the basic question - I am very new to SR)

• 
  @andrewtran9403 жыл бұрын

  so to transfer a square wave into square wave with no dc offset we use which filter

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  @davidwparent3 жыл бұрын

  What kind of filter gets rid of a DC (low frequencies) and passes high frequencies?

• 
  @wakeelshah58223 жыл бұрын

  Dear sir Can you tell me which light source you have used in this testing?

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  @davidwparent3 жыл бұрын

  Sorry, I do not see the comments much. just a tungsten incandescent bulb. I take a commercial cell, find the VOC in the sun (Taking note of the AMI value), and then adjust the light of the bulb to match. Real solar simulators are expensive. This was more for education, then publication.

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  @wakeelshah58223 жыл бұрын

  @@davidwparent Thank you sir

• 
  @Malalamalama3 жыл бұрын

  Thank you, cool video!

• 
  @anbazhagane12663 жыл бұрын

  hey u r animating that blue rectangular impulse graph rght from right to left how to code that in matlab please tell

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  @davidwparent3 жыл бұрын

  I think the Wikipedia age about convolution uses matlab, and might even come with this as an example.

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  @anbazhagane12663 жыл бұрын

  @@davidwparent how to get tht code

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  @davidwparent3 жыл бұрын

  @@anbazhagane1266 I do not use matlab

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  @A.Jaishankar3 жыл бұрын

  Can you please provide the (.model,param)commands, which are used to calculate ENOB and is it possible to calculate INL and DNL in ltspice?

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  @davidwparent3 жыл бұрын

  Here is a link top the file:www.dropbox.com/s/lmtat326xp8eayh/ti_pwm_compare_ENB_vs_FCLK.asc?dl=0 I do not measure inl, or dnl with this method. The worst-case ripple happens at 50% duty cycle, so one does not have to measure the other % duty cyles as the 50% case limits the ENOB. This only works for PWM DACS.

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  @A.Jaishankar3 жыл бұрын

  @@davidwparent Thank you for the reply 👍

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  @kionmahuermicio98603 жыл бұрын

  where is the spice model ??

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  @davidwparent3 жыл бұрын

  Right-click on the diode, left-click on select new diode, and then choose the diode you want.

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  @kionmahuermicio98603 жыл бұрын

  @@davidwparent Yes, i know, but i don´t have any spice model. Only the default.

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  @davidwparent3 жыл бұрын

  @@kionmahuermicio9860 I am not sure why you can not select a different diode model. Maybe ask the LTpsice group on yahoo groups.