This circuit was found in an Electronic Design from 1964. The components are from that time and can be replaced by equivalents. The modulation ranges from 0.25 to 0.75 of the 20 kHz pulses.
The presented circuit is suggested by Texas Instruments (www.ti.com) in its Application Report...
June 2016 - Mouser Electronics is providing the controller with N-channel MOSFET for IGBTs and...
Closing and opening S1 for a moment to charge the capacitor, the transistor conducts the load. The...