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AN7312 (IC202) : Dual recording/Playback pre-amplifier circuit with ALC
1. Terminal layout
~
14
8
~
1
7
2. Block diagram
Vcc
14
13
Ripple Filter
ALC
1
2
GND
3. Pin function
Symbol
Pin No.
1
GND
2
ALC time constant
3
ALC input Ch.1
4
Output Ch.1
5
Phase compensation Ch.1
6
N.E.B. Ch.1
7
Input Ch.1
8
Input Ch.2
9
N.E.B. Ch.2
10
Phase compensation Ch.2
11
Output Ch.2
12
ALC input Ch.2
13
Ripple filter
14
Vcc
12
11
10
9
Amp.
Ch2
Amp.
Ch1
3
4
5
6
I/O
-
GND
-
ALC time constant by resistance and capacitor
I
Right channel ALC input
O
Right channel output
-
No connect
I
Right channel negative feed back input
I
Right channel signal input
I
Left channel signal input
I
Left channel negative feed back input
-
No connect
O
Left channel output
I
Left channel ALC input
-
Ripple filter
-
Power supply
8
7
Function
UX-M3R
1-23
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