Found in a 1965 General Electric datasheet, this low frequency circuit divides the frequency of a 20 kHz signal by 10, thus obtaining a 200 Hz signal.
This circuit keeps the neon lamp on for a moment when it receives a pulse. The turn on time...
This circuit was found in General Electric's 1965 documentation. It appears elsewhere on the site....
This configuration was found in a 1990s documentation. Modern operational amplifiers can be used...