The circuit below is suggested by National Semiconductor in technical documentation on the LM3909. The circuit is powered by a single battery and has a very low consumption.
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...