Cordless telephone voice processing circuit diagram

Posted on Mar 28, 2007

CX9800 models of mobile phones and desktop PC have chosen excellent performance voice processing circuit, the amplitude and bandwidth of the microphone signal is compressed to

Cordless telephone voice processing circuit diagram
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improve the sensitivity of the microphone and microphone distance adaptability. The first level limiting amplifier, the second stage of active filter. Inserted between the microphone and the amplifier a high-pass RC filter, the amplifier input signal pre-emphasis; receiving de-emphasis circuit in the frequency discriminator output circuit can be improved signal to noise ratio of the voice signal. Phone amplifier selection 4558, Taiwan machine selects two single op-amp circuit, model 741.

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