Noise limiter

Posted on Feb 13, 2013

This limiter improves signal-to-noise ratio. It is connected between the detector output and the audio input (if high impedance) or at some relatively high-impedance section between two audio stages—preferably the low level stages.D1 and D2 can be any diode having relatively low forward resistance and very high back resistance. The circuit is excellent for receivers having bandwidths down to 2 or 3 kHz.

Noise limiter
Click here to download the full size of the above Circuit.

Increase the value of Cl for receivers having narrower bandwidths.

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