This circuit featuring a new quadruple operational amplifier was found in the March 1980 issue of Radio Electronics magazine. The circuit is to be powered by a symmetrical 15 V source.
We found this circuit in a 1977 Radio Shack manual. The light bands are given by the operating gain...
This circuit causes the voltage at the regulator output to rise slowly to the value determined by the...
This circuit is based on a PLL 566 and generates positive ramps. The frequency depends on Rx and C...