This circuit uses the SQ3524, a switching integrated circuit. The circuit was found in the April 1991 issue of Radio Electronics magazine.
This circuit is used in transceivers, enabling input selection by diode switching through polarity...
This configuration was found in an American publication from the 90s. Operators admit equivalents just...
This circuit was found in an Italian magazine Elettronica Prática of 1977. The transistors can be...