This circuit makes use of comparators and common operational amplifiers, having been found in Motorola Linear Interface ICs of 1993. The circuit requires symmetrical source.
The circuit shown was found in the 1994 National Semiconductor's Linear Application Handbook. The...
Phase and amplitude can be controlled in this circuit found in the May 1988 Radio Electronics...
This circuit was obtained from a 1968 documentation and can be adapted to use current equivalent...