This precision circuit was found in ancient American documentation. The most critical component is the PMOS transistor. The power supply must be symmetrical.
This electronic variac has the traditional configuration with triac already explored on the site,...
With this oscillator we can obtain a signal of 10 W of power at the frequency of 100kHz. The...
This circuit is based on an LM3900 transconductance operational amplifier, found in 1992...