MULTISTANDARD VIDEO AND SOUND IF SYSTEM
STV8224B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES
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VIDEO PLL DEMODULATION SO...
Description
STV8224B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES
. . . . . . .
VIDEO PLL DEMODULATION SOUND PLL DEMODULATION POSITIVE AND NEGATIVE MODULATION AGC FOR BG AND L STANDARDS AUDIO SWITCH DC VOLUME CONTROL VIDEO SWITCH
DESCRIPTION The STV8224B is a pictureand sound IF processor for multistandard application with very few external components and adjustments. It provides the audio and video switches for one SCART plug application. AM sound demodulation is performed with the STV8225 add-on. PIN CONNECTIONS
SHRINK24 (Plastic Package) ORDER CODE : STV8224B
PIF PLL FILTER AFC OUTPUT CVBS OUTPUT SWITCHING INPUT (STANDARD + INT/EXT) IF LC IF LC AUDIO HIGH PASS FILTER 2nd IF SOUND INPUT AUDIO AND 2nd IF DECOUPLING INTERNAL VIDEO INPUT VIDEO SWITCH OUTPUT EXTERNAL VIDEO INPUT
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
TUNER AGC STARTING POINT ADJUSTMENT TUNER AGC OUTPUT AGC CAPACITOR AGC CAPACITOR (L STANDARD) IF INPUT IF INPUT GROUND V CC EXTERNAL AUDIO INPUT FM DEMODULATED AUDIO OUTPUT AUDIO SWITCH OUTPUT
8224B-01.EPS
VOLUME CONTROL + MUTE
January 1997
1/12
STV8224B
BLOCK DIAGRAM
EXT CVBS AFC OUTPUT
V CC 5 6 1 12
6dB
2
17
18 11 10 SWITCHED CVBS
PIF PLL & AFC
19 IF INPUT 20 21 AGC 22 TUNER AGC OUTPUT 23 TUNER AGC 24 DC VOLUME
VID AMP
WHITE NOISE & SPOT INVERT
3
SFE 5.5
SFE 6.5
CVBS OUT
Int/Ext LOGIC INTERFACE BG/L SIF PLL LIMITER AUDIO Vref MUTE 14 13 16 15 7 8 4
9
STV8224B
SWITCHED AUDIO
EXT AUDIO
AUDIO OUT
AB...
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