Using only one integrated circuit this control was found in an 80's Electronic Engineering. The circuit has the drive's logic information and must be powered by an isolated power source.
This is the basic configuration of an operational amplifier sample & hold circuit. The FET and...
This circuit uses an 80's operational amplifier. The circuit is from an old RCA manual and can be...
This circuit originally appeared in a publication of 1997. With the changes, the circuit can be...