SA572

http://onsemi.com

8

(7,9)

BUFFER

VREF

DG

A1

(6,10)

(5,11)

(2,14)

(4,12)

(8)

(3,13)

(16)

CIN3

VCC

10mF

.1mF

2.2mF

CIN1

VIN

10mF

1mF

2.2mF

CIN2

2.2mF

VOUT

−

+

Figure 7. Basic Compressor Schematic

17.3kW

1kW

9.1kW

9.1kW

6.8kW

3.3kW

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 8 shows

the system level diagram for reference.

COMPRESSION

IN

EXPANDOR

OUT

REL LEVEL

ABS LEVEL

dB

dBM

3.0 V

547.6 mV

400 mV

100 mV

10 mV

1 mV

+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 mV

10 mV

2

1

2

Figure 8. SA572 System Level