We found this circuit in a publication by General Electric in the 1980s. The transistors and the PUT are from that time. The control is done by a tachometer based on an optical coupler.
This circuit can work with almost any JFET. The circuit is from an Electronics Now from April...
Data applied to the input of this circuit is shifted one ceII to right following the clock pulse....
This circuit provides 15W per channel and can operate with a single power supply. The circuit is...