This circuit was found in an ancient American documentation. The power supply is not given, but we have the voltages used. The relay is sensitive type for high voltage.
This amplifier was found in a Maxim documentation from the 90's. The circuit is an inverter type with...
This circuit works with practically any tunnel diode, transmitting signals in the FM range with a...
This circuit is suggested by National Semiconductor in its 1994 Linear Applications Handbook. The...