Protection Comparator B198

Summary This document is a technical schematic for a "Protection Comparator" circuit (part number B198) manufactured by Digital Equipment Corporation. The circuit diagram outlines a logic configuration utilizing multiple integrated circuits (specifically DEC 74H series logic gates) to compare signals. It features a power distribution network for -15V, +1.8V, and -3V, and includes a parts list detailing specific resistors, capacitors, and ICs (such as 74H55N, 74H53N, 74H50N, and 74H00N) required to construct the board. Test points (T.P. 1 through T.P. 6) are identified throughout the logic array for diagnostic purposes.