Design of 8:1 Multiplexer Using Gate Diffusion Input (GDI) Technique and Comparison of Delay Performance with Pass Transistor Logic

Abstract

Lot of advancement in VLSI technology makes low power and low energy as important issues in consumer electronics. In digital circuits, multiplexer or data selector plays an important role where it processes multiple input lines and gives a single output. With regard to pass transistor logic, the paper proposes to construct an 8:1 multiplexer using the Innovative Gate Diffusion Input (GDI) technique (PTL). In this paper, the multiplexer is designed using basic GDI cell. The design of digital combinational circuit by GDI technique is done using Tanner EDA tool and DSCH3. The GDI technique overcomes the disadvantages in Pass Transistor Logic(PTL). These logic styles are simulated, and To compare the propagation delay, power, and transistor count, a total of 20 samples are employed. The pass transistor logic has a propagation delay of 0.06378ns and a power dissipation of 0.06191 w, compared to the GDI technique's propagation delay and power dissipation of 0.04759ns and 0.04007w, respectively. Innovative GDI technique gives less propagation delay and power consumption when compared with pass transistor logic.