TDA8822 데이터 시트보기 (PDF) - Philips Electronics

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TDA8822

Universal I2C-bus programmable RF modulator

Philips Electronics 

Philips Semiconductors

Universal I2C-bus programmable RF

modulator

BLOCK DIAGRAM

Preliminary specification

TDA8822

handbook, full pagewidth

VIDEO

24

CLAMP

21

NICAM

NICAM

AMP.

TPSG

VIDEO

AMP.

CLIP

MD setting

AGND

23

SWITCH

VCCA

1

VOLTAGE

REGULATOR

TPSG

ON/OFF

ADDER

RFA RFB

19 18

OUTPUT

BUFFER

MIXER

20

RFGND

22

AUDIO

3

PREEMPH

2

ACP

14

SCL

15

SDA

16

P0

17

TPSG

AUDIO

AMP.

DEV

setting

VCO

SND-IF

AMP.

PS

setting

sound oscillator

ON/OFF

test

AUDIO

CHARGE

PUMP

test

AUDIO

PHASE

DETECTOR

frequency

setting

I2C-BUS

RECEIVER

AND

LOGIC

I2C-bus control

fdiv(audio)

fdiv(video)

in-lock flag

fref(video)

fref(audio)

11

13

VCCD DGND

TDA8822

PROG.

DIVIDER

14 BITS

PROG.

DIVIDER

test

VIDEO

PHASE

DETECTOR

RF oscillator

ON/OFF

4

RFOSCA

frequency

setting

PRESCALER

DIVIDE-BY-8

RF

OSCILLATOR

5

RFOSCB

6

OGND

7

RFOSCC

8

RFOSCD

10

VCP

test

VIDEO

CHARGE

PUMP

test

LOOP

AMP.

9

VVT

REFERENCE

DIVIDER

CRYSTAL

OSCILLATOR

12

XTAL

MGE674

1997 Jan 08

Fig.1 Block diagram.

4

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