Department: Computer Science & Engineering
Name: Ling Zhang
Email: lizhang @ ucsd.edu
Grad Year: 2008
This poster presents a new logic style, named Current-Mode Differential(CMD) logic, that achieves both high operating speed and low power consumption. Inspired by the low-voltage swing (LVS) logic, CMD logic uses a shunt resistor at the differential output to obtain constant low swing signal without the need to reset low. Furthermore, conditional shunt transistors are used for the internal nodes to prevent high-voltage swing, thus entirely eliminate the power-hungry clocked reset network in LVS circuits. We show that the CND logic is suitable for high-end microprocessor integer core by providing three datapath modules implemented in CMD logic. Our simulation results indicate that CMD circuits can achieve up to 85% power saving at the cost of less than 25% delay penalty, compared to LVS circuits.
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