Philips Semiconductors

Product specification

SA5752

Audio processor – companding, VOX and amplifier section

1997 Nov 07

6

SA5753

SA5752

PREAMP

NOISE

CANCEL

VOX

COMPRESSOR

PA

PA

HEADPHONE

SPEAKER

VOX

OUTPUT

MICROPHONE

GAIN

CONTROL

TX

LOW

PASS

FILTER

TX

BANDPASS

FILTER

SUMMING

AMP

RX

DE–

EMPHASIS

RX

BANDPASS

FILTER

DTMF

GENERATOR

ATTENUATOR

TX

PRE–

EMPHASIS

I2C

BUS

INTERFACE

Companding and Amplifier Section

Filter and Control Section

AUDIO TO

TRANSMITTER

AUDIO FROM

RECEIVER

FROM SYSTEM

CONTROLLER I C BUS

2

DEMODULATOR

VOX CONTROL

EXPANDOR

TDA7050T

CLOCK

1.2MHz

SR00661

Figure 3. Typical Configuration of Audio Processor (APROC) System Chip Set