Title :
High performance current-mode differential logic
Author :
Zhang, Ling ; Liu, Jianhua ; Zhu, Haikun ; Cheng, Chung-Kuan ; Hashimoto, Masanori
Author_Institution :
Univ. of California, San Diego, La Jolla
Abstract :
This paper presents a new logic style, named Current-Mode Differential logic (CMDL), that achieves both high operating speed and low power consumption. Inspired by the low-voltage swing (LVS) logic, CMDL 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 CMDL is suitable for high-end microprocessor integer core by providing three datapath modules implemented in CMDL. Our simulation results indicate that, operating at comparable speed with LVS logic, CMDL circuits can achieve up to 50% reduction of delay-power product compared to CMOS logic and LVS logic. In addition, CMDL reduces the power consumption of LVS by up to 40%.
Keywords :
CMOS logic circuits; clocks; current-mode logic; logic design; low-power electronics; microprocessor chips; CMOS logic; LVS circuits; conditional shunt transistors; current-mode differential logic; datapath modules; delay-power product; high-end microprocessor integer core; high-voltage swing; low power consumption; low-voltage swing logic; power-hungry clocked reset network; shunt resistor; CMOS logic circuits; Clocks; Delay; Energy consumption; Frequency; Logic circuits; Microprocessors; Resistors; Switches; Voltage;
Conference_Titel :
Design Automation Conference, 2008. ASPDAC 2008. Asia and South Pacific
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-1921-0
Electronic_ISBN :
978-1-4244-1922-7
DOI :
10.1109/ASPDAC.2008.4484046