Found in the September 1972 issue of Radio Electronics magazine, this signal injector is based on the HEP580. The circuit is powered by two batteries and its frequency is basically given by C1.
The TAA865 integrated circuit used in this 1986 project is no longer common today. The circuit is a...
) These two circuits were obtained in a 1977 Radio Handbook. The transistors are from that time,...
The circuit shown is from the Motorola Linear Databook of 1990. It is based on the Motorola T...