參數(shù)資料
型號： KB9223-L
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： RF AMP & SERVO SIGNAL PROCESSOR
中文描述： 射頻放大器
文件頁數(shù)： 21/34頁
文件大小： 614K
代理商： KB9223-L
PRELIMINARY
RF AMP & SERVO SIGNAL PROCESSOR
21
KB9223 / KB9223-L
M/M-97-P006
1997. 10. 17
1.9 AGC Stability Circuit
The AGC block is the function used to maintain the constant level of RF peak to peak voltage. After the
operation of RF envelop detection and comparing with reference voltage, RFO level is kept stable in 1Vp-
p, and inputted to EFM Slice.
Figure 12. AGC block
1.10 Post Filter
The adjustment of audio output gain and the integration of possible de-emphasis output are executed by
this circuit. This block has amps of 2 channel for gain and filter setting and mute pin for audio signal
muting.
Figure 13. Post Filter circuit
1.11 Center Voltage Generation Circuit
The center voltage is generated by voltage
divide using resistor .
Figure 14.
75
VCA
EQUALIZE
78
76
IRF
EQC
EQO
-
+
-
+
12
-
+
10
-
+
15
-
+
13
19
25K
25K
CH2I
GC2I
GC1I
CH1I
CH2O
GC2O
GC1O
CH1O
MUTEI
VCC
-
+
VR
30K
30K
VCC
71
Center
Generation Circuit
Voltage
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