Pass Transistor Xor. This paper proposes a low power 5 transistor xor xnor circuit. Pass transistor logic often uses fewer transistors runs faster and requires less power than the same function implemented with the same transistors in fully complementary cmos logic.
Comp103 l7 5 pass transistor pt logic a 0 b b f gate is static a low impedance path exists to both supply rails under all circumstances n transistors instead of 2n no static power consumption ratioless bidirectional versus undirectional comp103 l7 6 vtc of pt and gate a 0 b b f a b 0 5 0 25 0 5 0 25. Xor has the worst case karnaugh map if implemented from simple gates it requires more transistors than any other function. This design aims to minimize power dissipation and reduce transistor count while at the same time reducing the propagation delay.
Pass transistor logic ptl also known as transmission gate logic is based on the use of mosfets as switches rather than as inverters.
Pass transistor logic often uses fewer transistors runs faster and requires less power than the same function implemented with the same transistors in fully complementary cmos logic. Figure below shows the implementation of xor function using pass transistors. The xor gate utilizes six transistors to achieve a compact circuit design and was fabricated using the 130 x2009 nm ibm cmos process. The output node charges from 0 v dd v tn and the energy drawn from the power supply for charging the output of a pass transistor is given by c l v dd v dd v tn.
