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A new six-transistor CMOS XOR circuit with complementary output

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1 Author(s)
Vesterbacka, M. ; Dept. of Electr. Eng., Linkoping Univ., Sweden

A new CMOS XOR circuit based on pass transistors is proposed. It uses only six transistors to produce both an XOR and the complementary XNOR function. The circuit has full voltage-swing and negligible static power dissipation. A drawback is that the transistors need to be ratioed due to a feedback structure. Simulation results for the new circuit compared to simulation results for a reference XOR circuit indicated that the energy consumption was similar for the circuits. However, the propagation delay was 50% longer for the new circuit, due to the feedback structure. The main advantage of the new circuit was the reduction in device count from eight to six transistors

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Circuits and Systems, 1999. 42nd Midwest Symposium on  (Volume:2 )

Date of Conference: