The reference voltage for this circuit can be selected digitally. The circuit is from Radio Electronics dated February 1981. The 741 must be powered by a symmetrical source.
This low noise audio amplifier stage uses only one transistor and has a high enough gain to...
The circuit shown in the figure, generates a positive pulse whose duration depends on C1, from the...
This circuit is from the July 1973 Radio Electronics magazine. The circuit is based on the XR-205,...