With this circuit it is possible to obtain a higher voltage from a zener diode. The circuit is from a 1970’s EEE. The device used as a constant current source is uncommon today.
This circuit produces low frequency sinusoidal signals. The circuit is a phase shift oscillator...
This 2009 circuit serves as an aid to those working on audio equipment repairs. With it, the...
The circuit shown in the figure is a third order Bessel filter with unit gain using two...