This PNP transistor power stage was found in the May 1969 issue of Radio Electronics magazine. The circuit uses a transformer for excitation and requires 10W input for full output power.
This configuration of variable voltage regulator from 3 to 30 V with 100 mA maximum current was...
We can use high value electrolytic capacitors in alternating current circuits with the...
Found in a 90's EDN, this circuit changes the phase of a signal from 50 to 60 Hz in 120 degrees. The...