KB9223-L Просмотр технического описания (PDF) - Samsung

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производитель

KB9223-L

RF AMP & SERVO SIGNAL PROCESSOR

Samsung 

KB9223 / KB9223-L

PRELIMINARY

RF AMP & SERVO SIGNAL PROCESSOR

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.

IRF 75

VCA

EQUALIZE

78 EQC

76 EQO

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.

VCC

25K

-

+

25K

CH2I

-

+

GC2I

-

+

+

GC1I

-

+

CH1I

-

19

MUTEI

Figure 13. Post Filter circuit

12 CH2O

10 GC2O

15 GC1O

13 CH1O

1.11 Center Voltage Generation Circuit

The center voltage is generated by voltage

divide using resistor .

Figure 14. Center

Voltage

Generation Circuit

M/M-97-P006

1997. 10. 17

VCC

30K

-

+

30K

71 VR

21

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