SL1027P Datasheet, PDF (5/7 Pages) AUK corp – DUAL PREAMPLIFIER WITH ALC

2. Closed-loop Gain (f=1kHz)
• Closed loop voltage gain
G_V=20log(Z1/Z3) (dB)
• Playback amplifier gain
G_V=20log(R1/R3) (dB)
in low frequency
G_V=20log(Z1/Z3) (dB)
in high frequency
• Recording amplifier gian
G_V=20log(R1/R3) (dB)
4
+
C1
Z3
R3
Z1
R1
Z2
R2
C2
SL1027P
2
+
10u F
RL
3. Oscillation
When the closed-loop gain of amplifier is lowered, oscillation with occur. So the circuit
should be compensated by connecting of 10pF between pin 3 and pin 2, and 0.03 ㎌ in
series with 10Ω to the load end.
Signal
Input
10u F
+
10pF
3
+
5
AMP
10u F
2
+
-
51
4
1000p F
+
20u F
0.033u F
56
47K
10
RL
KSI-W021-000
5