Various circuit techniques for implementing ultra high speed circuits use current-controlled CMOS (C3MOS) logic fabricated in conventional CMOS process technology. An entire family of logic elements including inverter/buffers, level shifters, NAND, NOR, XOR gates, latches, flip-flops and the like are...http://www.google.es/patents/US6900670?utm_source=gb-gplus-sharePatente US6900670 - Current-controlled CMOS logic family
