关键词: Booth编码, 低功耗设计, 可重构设计

Abstract: To address the issues of high latency and high-power consumption associated with traditional radix-4  Booth-encoded multipliers, this paper introduces the implementation of a low-power, high-speed multiplier based on an improved Booth encoding scheme. The multiplier employs an improved radix-4 Booth encoding method and utilizes an advance  zero encoding module to mitigate power losses caused by conventional encoding. Additionally, a preprocessing approach is adopted to increase  extension sign bits, thereby reducing critical path delay. By optimizing the generation rules for the partial product array, the number of compressors is reduced. Furthermore, through enhancements to the compressor structure and the adoption of a reconfigurable compression design, the critical path is shortened, leading to a reduction in overall power consumption of the compression tree. The designed multiplier is implemented using  180 nm process and synthesized with Design Compiler. For a 32-bit multiplier employing this architecture, the critical path delay is 6.73 ns, the circuit area is 116 736 μm2, and the overall power consumption, obtained through random generation of 5 000 sets of random numbers, is 13 838 μW.

Key words: Booth encoding, low-power design, reconfigurable design