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Quadrature detector

:: EPE Chat Zone ­:: ­Radio Bygones Message Board :: » EPE Chat Zone » Archive through 26 November, 2016 » First Silly questions » Quadrature detector « Previous Next »

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Username: lost

Post Number: 87
Registered: 01-2011

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Posted on Sunday, 23 October, 2016 - 03:16 pm:   Edit Post Delete Post Print Post    Move Post (Moderator/Admin Only)

Trying to understand quadrature fm detection I discover that a parallel Rp Lp Cp network fed from an ideal voltage source via a low value capacitor (Cs) behaves as a high pass filter with voltage gain. The resonant frequency is given by 1/ 2 Pi sqrt(L(Cp+Cs)).
Where does the voltage gain come from?

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