(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

consider the cascading of two non identical amplifiers stages, each having a low-pass STC frequency response. STage 1 has a low freqency gain of A_{LF1}and a 3 dB frequency of f_{1}. Stage 2 has a low frequency gain of A_{LF2}and a 3 dB frequency of f_{2}. Derive a polynomial expression for f_{3dB}, the 3 dB frequency of the cascaded amplifier, in terms of f1 and f2. Express f_{3dB}in the following form.

a_{0}+a_{1}f_{3dB}+a_{2}f^{2}_{3dB}+...=0

find a_{0},a_{1},a_{2}...etc

2. Relevant equations

Av=gain

f=frequency

Av=A_{LF1}/(sqrt(1+(f/f1)))

3. The attempt at a solution

i truly dont know where to start. if anyone knows how to start the problem or has any tips to point me in the right direction it would be greatly appreciated.

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# Homework Help: Cascading low pass op amps, derive expression for f3db

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