Gandledorf
New Member
Well I've finally worked out what I think is the most appropriate bandpass filter for my 56kHz digital signal. It's an active state variable filter, with Q and G independantly settable.
**broken link removed**
Horowitz and Hill give the following equations for this filter:
f0 = 1 / (2 * pi * Rf * C)
Q = R1 / Rq
G = R1 / Rq
R = 10k (noncritical)
so for my filter I am planning to use:
Rf = 15k
R1 = 5k
Rq = 10k POT (set to around 100ohms)
Rg = 10k POT (set to around 5k)
C = 180pF
R = 10k
**broken link removed**
Horowitz and Hill give the following equations for this filter:
f0 = 1 / (2 * pi * Rf * C)
Q = R1 / Rq
G = R1 / Rq
R = 10k (noncritical)
so for my filter I am planning to use:
Rf = 15k
R1 = 5k
Rq = 10k POT (set to around 100ohms)
Rg = 10k POT (set to around 5k)
C = 180pF
R = 10k