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.
This circuit, from a 1975 Motorola manual, uses a power Darlington transistor of the time. We can...
This sinusoidal oscillator was found in Radio Electronics in 1989. It uses a 741, but other...
This filter configuration used in telecommunications uses 4 Jaumnann crystals that are interesting for...