This small phonographic amplifier was found in a 1967 General Electric documentation. The integrated circuit is from that time, providing 1.5 W of output power.
This circuit is suitable for instrumentation applications having been found in an old French...
This circuit, with an operational amplifier, was found in the Motorola Dataar Linear of 1990. The...
This circuit has the intensity of the signals controlled by the light that falls on the sensor....