NE570 Compressor Typical Test Circuit and Datasheet

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Since the NE570 known to be a useful low cost dual gain control circuit, this compressor or compandor device used to be applied in cellular and radio communications systems, according to the datasheet.

NE570 dual gain control test circuit

The figure above shows the NE570 typical test circuit. Accordingly, this NE570 device features Compressor and Expandor in One IC, Operates Down to 6V DC, Temperature Compensated, a dynamic range compressor (greater than 110 dB).

See completely about NE570 Compressor Typical Test Circuit and Datasheet here for full pdf archive (source: onsemi.com).