Triple rail logic gate

Abstract From the Canadian patent

A multi-input logic gate is disclosed having particular application for use as an AND or OR gate in a digital circuit. The OR sate of the present invention includes drive, sense and reference rails. A plurality of input lines are coupled to a gate of a plurality of N-channel transfers disposed between thedrive and sense rails one input line per transistor. The drive rail is coupled to ground through an N-channel transistor whose gate is controlled by the state of a detect line. The sense and reference rails are coupled to a voltage source (Vdd) through P-channel transistors whose gate is also coupled to the detect line. The P-channel transistor coupled to the sense rail is sized to pass …