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[sc-users] Re: Rq

In the case of most bandpass filters (BPF included, AFAIK), filter quality is
equal to center frequency divided by bandwidth. In the case of SC, we invert
the values: reciprocal quality (rq) is equal to bandwidth divided by center
frequency. So a bandpass filter with an rq of 0.1 and a center frequency of
1000 has a bandwidth of 1000Hz * 0.1 = 100Hz. So the half power points of
the filter are at 950Hz and 1050Hz (a half power point is a point on the
frequency response curve where the output signal has fallen by -3dB relative
to the input signal).

Eli



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