Design of Efficient Pass-transistor Binary ALU

Pass-transistor logic (PTL) uses pass transistors to directly pass logic levels from inputs to outputs to implement different logic functions.Compared to static CMOS design, pass transistor logic implements the same logic level with much less transistor count.Thus it is more area efficient and leads to less power consumption.Pass-transistor logic has been widely used in low power VLSI design, quantum computing, nano-electronics and optical computing.Arithmetic Logic Unit (ALU) is one of key components in modern microprocessor design.In this paper, an 8-bit ALU based on pass-transistor logic is implemented in PSPICE.The ALU is designed using PSPCIE hierarchy.The design of each individual components (such as NAND gate, full adder, multiplier, etc.) is discussed in detail.PSPICE power simulation is used to verify the power consumption of the ALU design.