The circuit is from Ferranti's 1974 transistor manual. Transistors are general purpose types, and the output waveform is rectangular. Components can be changed to other frequencies.
This voltage controlled oscillator, which can be used as a shield, generates signals in the 1.5...
This circuit was obtained from the 1976 Siemens integrated circuits manual. It is the circuit for...
This instrumentation circuit was found in the September 1989 Radio Electronics magazine. The...