This circuit from the 1980s uses an operational amplifier that is uncommon today. The circuit can be designed with modern operators. The gain is 40 dB.
This plug-in control was found in General Electric documentation from the 1970s. The SCR can be...
This circuit digitally selects the inputs of a sound system by applying its signals to the...
Found in 1965s General Electric documentation, this circuit is intended for the control of servos...