How to find Transfer Function of an amplifier from Bode Plot

Example shows how we can find S domain transfer function of an amplifier from the Bode plot of it's magnitude response in frequency domain.

[@johnnguyen8956]

you explanation is very clear, thank you :)

[@STEMprof]

Thanks John.

[@STEMprof]

Thanks for watching. For more Analog Circuit examples please see:
Logarithm Analog Computer with Op Amp th-cam.com/video/RpKEq5WyoLg/w-d-xo.html
Push-Pull Power Amplifier with Darlington Transistors th-cam.com/video/866MYibo8yE/w-d-xo.html
Analog Computer to Raise Signal to power n th-cam.com/video/IUTlBH1UraE/w-d-xo.html
Full-Wave Rectifier th-cam.com/video/DJJMNU-CYcg/w-d-xo.html.
Differential Equation Solver Analog Circuit th-cam.com/video/R3X5AYNZGEI/w-d-xo.html
Triangle Oscillator Op Amp circuit th-cam.com/video/JF5Up_cuL9k/w-d-xo.html
Diode-Amplifier VTC is analyzed in th-cam.com/video/vpGZkafxMJM/w-d-xo.html
th-cam.com/video/HeZRtnRXpEI/w-d-xo.html presents a circuit with op amps and feedback loops to design an analog computer that solves a second order differential equation.
For more analog signal processing examples see: th-cam.com/play/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt.html
I hope these Circuit engineering and analysis videos are helpful.

[@zoomlogo]

Is it possible to create a circuit given a transfer function?

[@STEMprof]

Thanks for watching and your good question. Yes, there are many ways to devise a digital or analog circuit given a transfer function (solution is not unique). Please see these related examples th-cam.com/video/dSZmymGa3Wo/w-d-xo.html , th-cam.com/video/_Izhk0hZR1k/w-d-xo.html , and here is a universal analog filter th-cam.com/video/2J-0msXZE2o/w-d-xo.html in which one can select the values of components to realize a target lowpass, Bandpass or highpass filter. I will post more examples soon. I hope these examples and this explanation are helpful. 🙋‍♂️

[@zoomlogo]

@@STEMprof Thanks! Your channel is awesome 😎

[@STEMprof]

@@zoomlogo You are welcome. Thanks for your encouraging comment. Glad that you like this channel and its videos. Are there specific topics or circuit/system problems that you are interested in? 🙋‍♂️

[@ebarbie5016]

You do not need to solve any equation to get the TF and the DC gain. Just write directly in normalized form and rearange...

[@STEMprof]

Thanks for your interest in this channel and for sharing your insights.

[@dl9ar245]

From 50 to 500 is one decade, isn't it? So the magnitude goes down by 40 dB/Decade. Am i wrong?

[@STEMprof]

From 50 to 500 is one decade. We have 20dB per decade drop as shown for that frequency region. You have a valid point that why magnitude then is shown to drop from 40dB at f=50 to 0 dB at f=500. Thanks for noticing. That 0dB shown on Y axis is redundant. It should be removed. Basically we start at flat region of 40dB up to f=50, then we just go down by 20dB when we reach f=500 and rest of the plot ... Thanks again DL9AR for noticing the redundant "0" shown on Y axis.

[@STEMprof]

Thanks for watching. Please see more circuit examples th-cam.com/play/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt.html I hope these Circuit Design and Analysis Examples are helpful. 🙏

[@svenvollfied]

Plz can you help now plz??

[@STEMprof]

Thanks for watching. For more OpAmp Filter examples please see th-cam.com/video/2J-0msXZE2o/w-d-xo.html which implements Highpass Analog Filter as well as Lowpass, Bandpass and Stopband Filters with Op Amps.
th-cam.com/video/U3AR1XCkX8k/w-d-xo.html is a BiQuad Filter Circuit Design and Transfer Function Analysis.
th-cam.com/video/Ga8Lu8sWlAk/w-d-xo.html explains Analog Filter Frequency Response and Poles and Zeros in Bode plot.
For more examples please check the Analog Circuit Design Videos Collection: th-cam.com/video/2J-0msXZE2o/w-d-xo.html
I hope these Analog High-pass, Low-pass and Band-pass filter design and analysis examples are interesting and helpful.

[@STEMprof]

Thanks for watching. Please see more circuit examples th-cam.com/play/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt.html I hope these Analog Circuit Design and Analysis Examples are helpful.