Vca Circuit Diagram - Yamaha CS-30 Service Manual

CS-30(S/# 1001-)
--Explanation for 1C
( I ClftBfl)
VCA
Circuit Diagram
VCA 1C (IG00151)
1. El . Input voltage for level control.
Input of the control voltage is pro¬
vided for changing the level expotenen
tiolly.
2. LI . Input of level control voltage.
Input of the control voltage i$ pro¬
vided for linear change of the level.
Input LI
wave
0 dB out
3. + IN . Input
Input of the level modulated signal
is provided.
shape
INPUT OUTPUT
4. -IN . Negative feed back.
Normally unused.
5. Vee . -15V input power source.
6. Vcc . +15V input power source.
7. GND . Earth
8 OUT . Output
Output
Wave Shape
Output of the following wave shape
is produced.
-ii - KEC-90109-78 A