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.
Found in American documentation, this circuit from the 90s uses components from that time. The...
Found in Electronics Now magazine in an issue from the 90s, this circuit is different from the...
The integrated circuit 4136 consists of operational amplifiers of type 741 in the same enclosure and...