Professor knows that we dont know a thing. He slowly introduced it and explained every bit in detail. He taught like he's teaching a student and not talking to a phD person.....thank you very much Sir!
Thanks for the video, nowadays we take electronics device for granted, when the professor explains about the hard drive concepts. As a designer, I was thinking how huge engineering effort would have been spent to realize the concept. Thanks for all the great minds of physics, electronics, mechanics..
Super , Thanks a lot sir for your way to deliver the lecture and core knowledge of Analog Electronics. I wish i will watch your complete lecture series on Analog and make my base strong. You are my second "Behzad Razavi".
Will comeback for clarity / questions 9:40 Noise is a high frequency jerks of your signal. When you amplify the i/p signal, wont the noise too amplify? Does the 'amp' sub circuit contain in itself a *low pass filter* ? 9:43 So I think i got it. Does that *system* refers to A/D unit or Sensor unit? If it is A/D unit it makes sense, you make i/p volt. high thus making noise produced by A/D unit *negligible in comparision only* ? 12:47 'much more economical' :) how so? 37:30 *'DC power to be translated to the frequency'* meaning !? Straight from net, Frequency translation is the process of shifting a signal from one frequency to another, without loss of information in the signal. So i think to the external dc (which has 0 frequency) we add some sine waves, hence giving it some frequency.
Amplifier can be maid through passive components by decreasing the resistance by adding a bigger cross sectional area wire which will reduce its resistance.
Could someone please explain to me the reason why we need to have nonlinear elements in the amplifier? I didn't quite understand his explanation. Is it because in this case we'd have a Frequency of 0 Hz at the output --> DC Voltage, because of the Battery Voltage supplying the amplifier? Thanks!
DC source will provide power to load at zero frequency. The main input is our time varying signal, which has a fundamental frequency greater than zero frequency. This signal to be amplified, should be provided power at the fundamental frequency. But a linear system only provides power at zero frequency to load. By applying a non linear system, I can create harmonics, which can be decomposed in various fundamental frequency term which will contain the DC source power
Thank you for your beautiful lecture. Just one doubt: Max. power at R_L = [vo/sqrt(2)] * [vo/sqrt(2)] / (2*R_L) = vo/(4*R_L); how another 2 is coming in the bottom Sir? Please rectify me.
@@nidhishsharma8215 Actually its because we assumed Rl and Rs to be equal so there is a voltage drop of Vrms/2 across Rs, so effective voltage across Rl is Vrms/2 that is V/2sqrt(2).
There can be many types of amplifier..voltage, current resistance, transconductance etc..However amplifier means the blackbox has to amplify power as pointed by prof
