Found in American documentation from the 1980s, this circuit has a diode feedback. At the exit we have an indicator LED. The LM3900 is a transconductance operational amplifier.
This circuit controls loads powered by the power grid, remembering that it is a half wave...
This circuit was found in an old Electronic Design. It makes use of sidacs and operational not very...
In the figure we have the way to compensate an operational amplifier. The circuit is valid for...