This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and the SCR is a general purpose type The pitch frequency is given by R1 and C1 as formula next to the diagram.
This circuit generates trains of pulses in regular intervals determined by R1 and C1. The...
The circuit shown in the figure is indicated for alternative sources of energy, such as those...
The circuit presented shows how to use a diode in temperature compensation of a push-pull output...