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.
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
This circuit was obtained in a 1967’s EEE. Transistors and integrated circuits can be replaced by...
In the figure we have a simple amplifier stage for BC547 series transistors. The gain is...