1996 Nov 20

3

Philips Semiconductors

Product specification

Dual channel TV FM intercarrier

sound demodulator

TDA9821

BLOCK DIAGRAM

Fig.1 Block diagram.

(1) Resistor and potentiometer between capacitor and earth are inserted if adjustment of stereo channel separation is required.

handbook, full pagewidth

TDA9821

V =

4.5 to 8.8 V

P

(1)

7-STAGE

LIMITER

AMPLIFIER 1

VCO 1

7-STAGE

LIMITER

AMPLIFIER 2

VCO 2

optional stereo

channel separation

adjustment

mute

intercarrier

SUPPLY

11

12

14

13

15

1

10

MHA424

9

Rs

Rpot

7

8

5.5 MHz (B/G)

5.74 MHz (B/G)

(1)