This circuit was found in Sgnetics documentation from the 80's. The circuit also has loudness control. The power supply must be symmetrical.
This relay time delay circuit was found in the October 1993 issue of Electronics Now magazine. The timing...
This low noise, low frequency instrumentation circuit was found in a 1976 NASA circuit manual. The...
Hig stability is the main feature of the 10 V regulator circuit shown in the figure and suggested by...