This circuit is from a factory manual from the 80s. The circuit can be implemented with more modern operationals. Capacitor C1 is a low leakage type. The power supply must be symmetrical.
This is a conventional FM micro transmitter circuit already used several times on this site. The...
We found this circuit in a European schematic from the 90s. The used integrated circuit can still...
This circuit was found in Ferranti's 1974 transistor manual. Transistors are general purpose types...