Indicated on an 80's Radio Electronics, this circuit provides at its output a voltage that is the peak value of the input voltage. The supply voltage must be higher than the expected peak.
This polarization step for electret microphones was found in an Electronics Now from the 90s. The...
This control for bass, midrange, and treble was found in the March 1995 issue of Electronics Now...
We found this circuit in a 1993 documentation. It is a high input resistance millivolimeter whose...