Linear switch using FET (CB6919E)

Found in a 1967 Electronics World, this circuit can use any modern equivalent FET. Observe the amplitude of the input and output signals.

| Clique na imagem para ampliar |

Current monitor with digital output (CB7275E)
Found in Linear Technology documentation, this circuit drains only 70 uA of the monitored circuit....
Potentiometer Position Indicator (CB6694E)
Found in an old publication, this circuit uses an analog milliammeter to indicate the position of a...
Simple Microphone Preamplifier (CB4768E)
This circuit was found in a Popular Electronics of the 90s. The output amplitude will be between...