ENERGY ECONOMIZED PASS-TRANSISTOR LOGIC CIRCUIT AND FULL ADDER USING THE SAME

摘要

Disclosed is an energy economized pass-transistor logic having a level restoration circuit (50) free from leakage and a full adder using the same. The logic comprises a functional block (10) having a plurality of n type FET's (MI...M4), for performing at least one logical function of inputs (12, 14, 16, 18) to generate two complementary signals (20, 22), the complementary signals (20, 22) being a weak high level signal and a strong low level signal; and a level restoration block (50) having first and second CMOS inverters (52,54), for restoring the weak high level signal to a strong or full high level signal and preventing a leakage current flowing through one of the first and the second CMOS inverters (52,54) where the weak high level is applied.