This circuit delivers at its output a voltage that proportional to the amplitude of the input signal in a range of 36 dB. We found it in an American documentation from 1966.
This power control from Motorola's 1971 SCR Power Control Fudamentals can control full wave loads...
The transistors can be the BC548 and BC558 and the operational can be a 741. The circuit is from...
This circuit can be used to receive signals from CB18636E and other modulated light transmitters in this...