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.
This optically coupled circuit was found in the February 1968 Radio Electronics magazine. The...
This is the receiver for the CB17133E. Its main feature is that it uses only transistors. The...
This circuit, from the 1990 Motorola Dataar Databook, can use any LM139 series comparator. The circuit...