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.
The circuit is from an old documentation making use of an operational amplifier of the time. The...
This circuit makes use of a 741 single source operational amplifier to measure resistors on a...
This circuit uses two transistors, the low noise BC549. Its quality is very good and it has a...