UTC571

LINEAR INTEGRATED CIRCUIT

YOUW ANG ELECTRONICS CO.LTD

1

COMPANDER

DESCRIPTION

The UTC571 is a versatile low cost dual gain control

circuit in which either channel may be used as a dynamic

range compressor or expandor. Each channel has a full-

wave rectifier to detect the average value of the signal, a

linerarized temperature-compensated variable gain cell,

and an operational amplifier.

The UTC571 is well suited for use in cellular radio and

radio communications systems, modems, telephone, and

satellite broadcast/receive audio systems.

FEATURES

• Complete compressor and expandor in one IChip

•Temperature compensated

•Greater than 110dB dynamic range

• Operates down to 6VDC

• System levels adjustable with external components

• Distortion may be trimmed out

• Dynamic noise reduction systems

• Voltage-controlled amplifier

DIP-16

APPLICATIONS

•Cellular radio

•High level limiter

•Low level expandor—noise gate

•Dynamic filters

•CD Player

PIN CONFIGURATION

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

RECT CAP 2

RECT IN 2

AG CELL IN 2

VCC

INV.IN 2

OUTPUT 2

THD TRIM 2

RECT CAP 1

RECT IN 1

AG CELL IN 1

GND

INV.IN 1

OUTPUT 1

THD TRIM 1