A 500-MHz low-power five-port CMOS register file

摘要

Current-mode approach in register file has the great advantage of high operation speed with low power consumption. Under 0.35-/spl mu/m CMOS technology, we present a 1.85-ns read access, 32/spl times/32-bit, five-port register file in which a modified current-sense amplifier is used. The delay match circuit and TSPC-FF are also used to improve speed. Energy saving is achieved by current mode and other key ideas. Simulation results show it consumes 640 mW at 500 MHz 3.3 V. It can still work at 2.3 V with 350 MHz 300 mW.