All-In-One BiQuad Analog Filter: LPF HPF BPF

This video presents a quick circuit analysis method to find the S domain voltage transfer function of a versatile all-in-one active biquadratic analog filter designed using three operational amplifiers. The circuit is biquadratic because its transfer function is a rational function with 2nd order polynomials both in numerator and denominator. There are multiple feedback paths in this circuit that need to be properly considered in a quick analysis utilizing inverting amplifier and virtual short in op amp circuits.

[@wafikiri_]

A very compact filter full of functionality.
Thank you!

[@STEMprof]

Thank you for watching. Glad that it is useful.

[@STEMprof]

Thanks for watching. Here are few more examples about Analog Low-pass, High-pass and Band-pass filters:
Analog Filter Frequency Response and Poles and Zeros in Bode plot ruclips.net/video/Ga8Lu8sWlAk/видео.html
Analog Filter with Op Amps: Find Voltage Transfer Function ruclips.net/video/AJEyXOCj8Q4/видео.html
Universal Analog Filter Lowpass, Highpass, Bandpass and Stopband Filters with Op Amps ruclips.net/video/2J-0msXZE2o/видео.html
BiQuad Filter Circuit Design and Transfer Function Analysis ruclips.net/video/U3AR1XCkX8k/видео.htmlfeature=shared
For more examples please check the Analog Circuit Design Videos Collection: ruclips.net/video/2J-0msXZE2o/видео.html
I hope these circuit examples are helpful.