TDA8120B datasheet(1/6 Pages) STMICROELECTRONICS

Il numero della parte	TDA8120B

Spiegazioni elettronici	MULTISTANDARD VIDEO AND SOUND IF SYSTEM

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TDA8120B

MULTISTANDARD VIDEO AND SOUND IF SYSTEM

October 1993

.

GAIN CONTROLLED IF AMPLIFIER

.

VIF

OPERATING

FREQUENCY

UP

TO

50MHz

.

SYNCHRONOUS DETECTOR

.

WHITE SPOT INVERTER

.

VERY LOW DIFFERENTIAL ERROR

.

VERY LOW PHASE ERROR

.

INTERNAL AGC SWITCH (B/G - L)

.

AGC TOP. SYNCH. FOR STANDARD B/G

.

AGC TOP WHITE FOR STANDARD L

.

QUASI SPLIT SOUND FOR STANDARD B/G

.

SOUND DETECTOR FOR STANDARD L

.

VIDEO MUTING FACILITY

.

SEPARATED SOUND OUTPUT

.

OPERATES WITHOUT EXTERNAL GATING

PULSE

DESCRIPTION

The TDA8120B is a monolithic IC for TV video IF

and Sound IF amplification and demodulation that

can operate with all the TV standards.

The Video IF section can handle negative (B/G) or

positive (L) modulated video signals by means of

DC switching.

DIP24

(Plastic Package)

ORDER CODE : TDA8120B

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

24

23

22

21

11

12

AF AM OUT

CARRIER TUNING

SUPPLY VOLTAGE

2nd IF SOUND OUT (QSS)

GND

VIDEO OUTPUT

SUPPLY VOLTAGE

AGC TIME CONSTANT

CARRIER TUNING

V

S1

T

2V

T2S

T1S

V

S2

QSS OR AM INPUT

GND

VIDEO IF INPUT

STANDARD SWITCH

AGC TIME CONSTANT

AND VIDEO MUTING

TUNER AGC OUTPUT

TUNER AGC DELAY

T

1V

PIN CONNECTIONS

The Sound IF section acts as a Quasi Split Sound

(QSS) subsystem in B/G transmission and allows

a second Sound IF with high rejection of the video

information.

The DC switch can modify the Sound IF configura-

tion to process AM modulated Sound signals (L).

The TDA8120B is assembled in a 24 pin dual in line

power package.

1/6

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