AN8807SB Datasheet, PDF (10/10 Pages) Panasonic Semiconductor – Three-Beam Method Head Amplifier IC for CD-ROM

AN8807SB
ICs for CD-ROM Player
• Envelope Detection
The envelope detection circuit extracts fluctuation of RF signal required for adjustment of focus balance.
Pin11 and 12 are connecting pins with capacity for constructing the filter. It is recommended that for Pin11, a capacitor of
100pF around, and for Pin12, an external capacitor of 0.027µF around should be connected against VCC.
Pin19 is for output and must have external capacity for constructing the filter, and it is recommended that an external capacitor
of 0.027µF around should be connected to it for VREF.
CENV
11
CEA
12
ENV
19
• CROSS Detection
AGC
ENV Detection
Figure 6 : Envelope Detection
24
CROSS
4
C.CRS
25
TEOUT
Figure 7 : CROSS Detection
Track cross signals are detected from tracking error output. Pin4 is a connecting pin for constructing the filter, and it is
recommended that a capacitor of 2.2µF around should be connected to it for VREF.