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Noise limiter

2017-09-12 20:30  
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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 stagesa€”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

Increase the value of Cl for receivers having narrower bandwidths.

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