This circuit was found in a 73 magazine for radio amateurs from the 90s. The circuit uses high voltage transistors and the relay is high voltage as well.
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
Found in Texas Instruments documentation from the 1980s, this circuit applies to digital signal...
This circuit was found in a 1980s US publication. There may be some difficulty in obtaining the...