Title :
A 64-bit lookahead carry chain in Inverted-Domino logic
Author :
Jia, Song ; Liu, Fei ; Gao, Jun ; Liu, Ling ; Wang, Xinan ; Zhang, Tianyi ; Chen, Zhongjian ; Ji, Lijiu
Author_Institution :
Inst. of Microelectron., Peking Univ., Beijing, China
Abstract :
Here we present a novel 64-bit adder carry chain design implemented in Inverted-Domino (iDomino) logic that is an improved style over conventional Domino for better performance. In the proposed scheme capacitances at output node are reduced and foot transistor in Domino logic is absorbed into clock tree to increase circuit speed. A 64-bit lookahead carry chain is constructed and HSPICE simulation in 0.25 μm CMOS parameter shows that carry propagation can be done in less than 480 ps and a 20% speed enhancement over Domino is achieved.
Keywords :
CMOS logic circuits; SPICE; adders; capacitance; clocks; 0.25 micron; 64-bit adder carry chain design; 64-bit lookahead carry chain; CMOS parameter; SPICE simulation; capacitance; clock tree; conventional Domino; inverted domino logic; output node; transistor; Adders; CMOS logic circuits; Capacitance; Clocks; Delay; Digital audio players; Logic circuits; Logic design; MOS devices; Pulse inverters;
Conference_Titel :
Electron Devices and Solid-State Circuits, 2003 IEEE Conference on
Print_ISBN :
0-7803-7749-4
DOI :
10.1109/EDSSC.2003.1283532
