Audio Limiter (CB25429E)

We found this circuit in the January 1992 issue of Radio Electronics magazine. The circuit consists of an automatic gain control.

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Analog Counter (CB6140E)
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Crystal Colpitts Oscillator (CB13853E)
This circuit is from the National Semiconductor 1977 FET Databook. The FET can be BF245 or MPF102...
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