This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset current setting. The configuration can be adapted to operate with modern equivalent components.
This small audio amplifier was found in the May 1994 issue of Electronics Now magazine. The power...
The displayed relay operates with an audio signal applied to the input. The transistors can be...
The circuit shown in the figure and uses the diode in the leakage current operation mode. In it,...