This circuit detects changes in the active cycle of the input signal. The circuit was obtained in a 1966 EEE. Transistors are general purpose types of the time.
The simple circuit doubler shown here can source a voltage two times the one applied to the input. The...
This circuit is from an old American documentation using LEDs in the rectification. The circuit...
This circuit using an operational amplifier was found in old American documentation. It can be...