Found in an old American documentation this FM modulator makes use of a varactor diode. The circuit can be easily implemented given the small number of components used.
This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of...
This circuit is from an 80's American documentation. The circuit uses components of the time which...
This circuit can reduce the voltage of a source by providing regulated adjustable output. The...