STV8224B

MULTISTANDARD VIDEO AND SOUND IF SYSTEM

WITH AUDIO AND VIDEO SWITCHES

January 1997

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TUNER AGC STARTING POINT ADJUSTMENT

TUNER AGC OUTPUT

AGC CAPACITOR

AGC CAPACITOR (L STANDARD)

IF INPUT

IF INPUT

GROUND

V

EXTERNAL AUDIO INPUT

FM DEMODULATED AUDIO OUTPUT

AUDIO SWITCH OUTPUT

VOLUME CONTROL + MUTE

CC

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

PIN CONNECTIONS

SHRINK24

(Plastic Package)

ORDER CODE : STV8224B

.

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 picture and 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.

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