The SA571 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 SA571 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 110 dB Dynamic Range

• Operates Down to 6.0 VDC

• System Levels Adjustable with External Components

• Distortion may be Trimmed Out

• Dynamic Noise Reduction Systems

• Voltage Controlled Amplifier

• Pb−Free Packages are Available*

Applications

• Cellular Radio

• High Level Limiter

• Low Level Expandor − Noise Gate

• Dynamic Filters

• CD Player