User Manual
doepfer
System A - 100
VCF 4 A-123
7
H 
To create a 
24 dB bandpass filter 
with
voltage-controlled middle frequency and
bandwidth, put both filters in series (see the
A-122 user examples). For voltage control of
middle frequency and bandwidth, follow the
relevant notch filter instructions. (see Fig. 5).
Fig. 5: Effect of FCV and BCV on the band pass
filter response.
Freq. 
Ö
FCV
BCV
f
M








