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NE/SA575 datasheet specifications
The NE/SA575 is a precision dual gain control circuit designed for low voltage applications. The NE/SA575’s channel 1 is an expandor, while channel 2 can be configured either for expander, compressor or automatic level controller (ALC) applications.
NE/SA575 applications: portable communications, cellular radio, cordless telephone, consumer radio, portable broadcast mixers, wireless microphones, modems, electric [...]
Audio compander schematic
This audio compander circuit schematic is equiped with NE575 produced by Signetics, it is working with a 3 - 7V battery and has a current consumption of 3.5mA at 3V and 5mA at 7V. The companding process ( input compression, output as expander) is improving the signal/noise ratio on a communication line.
NE575 contains 2 ic’s [...]
Automatic Gain Control - AGC
Automatic Gain Control or AGC is a circuit design which maintain the same level of amplification for sound or radio frequency. If the signal is too low the AGC circuit will increase ( amplify ) the level and if is to high will lower it to maintain a constant level as possible.
The Automatic Gain Control [...]
