UTC571
COMPANDER
DESCRIPTION
LI
NEAR I
NTEGRATED CI
RCUI
T
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
RECT CAP 1
RECT IN 1
AG CELL IN 1
GND
INV.IN 1
RES.R
3
1
OUTPUT 1
THD TRIM 1
1
2
3
16
15
14
RECT CAP 2
RECT IN 2
AG CELL IN 2
VCC
INV.IN 2
RES.R
3
2
OUTPUT 2
THD TRIM 2
4
5
6
7
8
UTC571
13
12
11
10
9
YOUW ANG ELECTRONI CO.
CS
LTD
1
UTC-IC [ UNISONIC TECHNOLOGIES ]
