All-N-logic high-speed true-single-phase dynamic CMOS logic

In this paper, a novel all-N-logic single-phase high speed dynamic CMOS logic is introduced and analyzed. The circuits achieve high speed by eliminating the need for the low-speed P-logic blocks. The use of all-N-logic allows the speed of the proposed circuits to be two to three times the speed of conventional CMOS dynamic circuits. An 2:1 frequency divider, using proposed ANL2 circuits, is simulated using 0.8 μm CMOS technology with the operating clock frequency reaching as high as 1.5 GHz. A pipelined 8-b carry generator of five-stacked NMOS transistors, which operates at a clock rate of over 710 MHz, has also been simulated. Experimental results show that the proposed circuits operate over 910 MHz implemented in a 1.2 μm CMOS technology