5 GHz pipelined multiplier and MAC in 0.18µm complementary static CMOS

Wave pipelining improves the throughput of a circuit by exploiting the delays of combinational elements, rather than register clocks, for synchronization. Our proposed approach, called HyPipe, combines conventional register-based pipelining with wave pipelining and aims to take advantage of both pipelining methods [5]. In this paper, we applied HyPipe to develop 4-bit signed multipliers and 4-bit MACs targeting for high speed or low-power applications. The circuits were implemented in fully complementary CMOS in TSMC 0.18 μm technology. SPICE simulation results indicate that the two circuits can operate at around 5 GHz under the supply voltage of 1.8 V or at around 1 GHz under 0.8 V with about 25 times less power dissipation.