We found this circuit in a Radio Electronics from October 1963. The circuit uses an output transformer with a center tap. The trimpot is adjusted for higher gain and lower quiescent current.
This simple PWM control was found in American documentation. We can use any power transistor...
The sophisticated white noise generator we present uses four 741 operational amplifiers. The...
The sampling and retention circuits are used in analog to digital converters and in some other...