HA12220 Hitachi Semiconductor, HA12220 Datasheet - Page 14

• Manufacturer Part Number: HA12220
• Description: CD-ROM Drive Head Amplifier IC
• Manufacturer: Hitachi Semiconductor

HA12220F
Bias, Reference Voltage
Pin 26 is for a bypass capacitor to eliminate noise from the IC’s internal bias circuits.
Connect a capacitor to pin 25 to remove the ripple component from the reference voltage.
The IC’s internal reference voltage is connected internally.
Rev.1, Apr. 1997, page 14 of 20
Figure 13 Bias, Reference Voltage
27
V
BIAS
CC
26
BYPS
12
0.1
40k
25
+
–
+
VCF
10
VCB
40k
GND