This frequency shift modulation circuit was found in the November 1994 issue of Electronics Now magazine. The circuit operates at low frequencies.
Short pulses can be found in this 90's EDN circuit. The load is 50 ohms and the transistors are from that...
Found in an American 1980s documentation, this circuit generates frequencies in the range...
This old configuration of an audio amplifier has a push-pull two-transistor output stage. Output...