Found in a documentation for radio amateurs from the 90s, this circuit is suitable for RF measurements in transmission systems. The potentiometer must be of a special type.
This traditional circuit generates a 200 Hz sinusoidal signal. The frequency depends on the...
This circuit supplies a continuous voltage at its output, which is the peak value of the...
This circuit is suggested by National Semiconductor and has an excellent gain, for a photodiode as a...