Auto Bias for FET (CB6125E)

This configuration is from a 1964 US documentation valid for any FET. The range of power voltages depends on the application.

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Passive tunable filter (CB7407E)
Found in American documentation from the 1980s, this circuit is a basic signal rejection filter...
Moving hole with the 4017 (CB25433E)
This circuit is from a Radio Electronics magazine from February 1992. The circuit has the effect...
Debouncer circuit (CB7949E)
This "debouncer" was found in Popular Electronics, using TTL technology. For this reason, it can be...