Peak detector (CB8294E)

Found in a 80’s Popular Electronics, this circuit detects the positive peak of a signal providing a equal value voltage at its output.

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Low Drift Sampling and Hold (CB5954E)
This low drift or offset circuit is from an 80's documentation. The configuration can be made with...
Logarithmic Light Meter (CB5305E)
This circuit has a logarithmic response as a function of the light falling on the sensor. The...
Tunable notch filter (CB7402E)
Found in 80's Electronic Engineering, this circuit can tune the frequency to be rejected. The power...