VC-GAIN
VC-RESONANCE
IN
OUT
VCA
RESONANCE
VCA
VC-FREQ
VC-FM
VC-FM
FM
FREQUENCY
GAIN
FRE QUENC Y
24db LP filter
VCA
VC-GAIN
VC-RESONANCE
IN
OUT
RESONANCE
VCA
VC-FREQ
VC-FM
VC-FM
FM
FREQUENCY
GAIN
FRE QUENC Y
24db LP filter
Fig. A
Fig. B
(cont. on pg.5)
HD3
HD2
1 2 3
2
1
HD2
2
1
1 2 3
HD1
HD3
HD1
