This protection circuit for standing waves was found in a manual of high frequency circuits and transmitters from the 1980s. The circuit is used with transmitters.
This circuit was found in Radio Electronics from the 90s. The transistor is for general use. The...
We found this circuit in a 2005 Linear Technology application manual. The circuit makes use of a...
This circuit is from 1971 American documentation. Transistors are still common except for 2N2060...