This circuit was found in a 1968 documentation. The circuit generates three rectangular signals from a 400 Hz sinusoidal input. The circuit is suitable for applications in power controls.
This circuit uses a diode as a radiation sensor. The operational ones are old because the...
This circuit generates a signal in the tone-modulated FM range for tuning receivers. The circuit is...
The circuit shown was found in a 1967 RCA manual. Modern equivalent components can be used. The...