A novel high-performance CMOS 1-bit full-adder cell

A novel 16-transistor CMOS 1-bit full-adder cell is proposed. It uses the low-power designs of the XOR and XNOR gates [1], pass transistors, and transmission gates. The cell offers higher speed and lower power consumption than standard implementations of the 1-bit full-adder cell. Eliminating an inverter from the critical path accounts for its high speed, while reducing the number and magnitude of the cell capacitances, in addition to eliminating the short circuit power component, account for its low power consumption. Simulation results comparing the proposed cell to the standard implementations show its superiority. Different circuit structures and input patterns are used for simulation. Energy savings up to 30% are achieved.