This circuit was found in an old documentation for radio amateurs. The circuit makes use of an uncommon integrated today. The circuit converts telegraph signals to be used on the computer.
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...