The NE570 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 NE570 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 IC
•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
•Pb−Free Packages are Available*