National Chiao-Tung University

Department of Electronics Engineering & Institute of Electronics





High-Speed and Low-Power Multiplier-Accumulator Micro-Architecture and Circuit Design






Student : Shu-Hsuan Lin

Advisor : Dr. Wei Hwang



Abstract

A power-speed optimization technique of circuit level for a datapath of processors is proposed in this thesis. By using efficient multiplication algorithms, a high-speed multiplier-accumulator micro-architecture is designed in this thesis. According to this high-speed micro-architecture design, a low-power transistor level multiplier-accumulator is also implemented. Take the transistor size, the supply voltage, and the threshold voltage as tuning variables which are optimized jointly in terms of power and speed in this thesis which can reduce the dynamic power to one half and can increase the speed to 20%. Design techniques of leakage current suppression are discussed in chapter 4. The micro-architecture optimization methods in terns of power and speed are also examined in chapter 5.

All the results are simulated in TSMC 0.13 µm CMOS technology. Making use of micro-architecture and circuit level design techniques, the critical path of a 16X16+32 multiplier-accumulator operation is within 2ns, the dynamic power consumption is below 10 mW.