The circuit shown in the figure below is from the 1993 Linear Technology Applications. The operational ones used are uncommon and the use of equivalents can be analyzed.
This RF circuit measures transmission power from 0.25 W to 10 W. The maximum frequency depends on...
Found in a 1970 American publication, this circuit uses transistors of the time. These transistors...
This microphone circuit was found in a collection of American 80's layouts, using operational...