Philips Semiconductors

Product specification

SA572

Programmable analog compandor

1998 Nov 03

9

Basic Compandor System

The above basic compressor and expandor can be applied to

systems such as tape/disc noise reduction, digital audio, bucket

brigade delay lines. Additional system design techniques such as

bandlimiting, band splitting, pre-emphasis, de-emphasis and

equalization are easy to incorporate. The IC is a versatile functional

block to achieve a high performance audio system. Figure 9 shows

the system level diagram for reference.

COMPRESSION

IN

EXPANDOR

OUT

REL LEVEL

ABS LEVEL

dB

dBM

3.0V

547.6MV

400MV

100MV

10MV

1MV

+29.54

+14.77

+12.0

0.0

–20

–40

–60

–80

+11.76

–3.00

–5.78

–17.78

–37.78

–57.78

–77.78

–97.78

VRMS

100

µV

10

µV

INPUT TO

∆G

AND RECT

2

1

2

SR00702

Figure 9. SA572 System Level