Found in a Popular Electronics from the 90s, this circuit is intended to measure the harmonic distortion of an audio signal. The circuit can be tuned between 970 and 1030 Hz.
We found this configuration in a Radio Electronics from 1989. The circuit can be designed with...
This interesting configuration was found in a 1965s Electronic Design. It makes use of components of...
This circuit is from old American documentation intended to trigger the flash of a camera flash with...