This circuit was suggested by General Electric / RCA in a 1980s documentation. The components are of the time and the circuit must be powered by symmetrical source.
We find this circuit in a 1970 publication. Transistors can be replaced by current equivalents and LDR is...
This stage was used in old audio ampliiers and radios from the 1950s and 1960s. It uses one of the...
January 2017 - Texas Instruments' new TPS54200 integrated circuit for excitation of LEDs with a...