We found this circuit in the November 1975 issue of Radio Electronics magazine. It uses a digital module from the time with several adjustments. The power supply must have the indicated voltage.
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...