This detector with ultra-low deviation was found in an American documentation from the 90s. Operational amplifiers are from that time. The power supply must be symmetrical.
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...