Title :
A hybrid Ling carry-select adder
Author :
Grad, Johannes ; Stine, James E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA
Abstract :
Hybrid adders, combining a sparse carry-lookahead tree and a carry-select output stage are a well-known implementation form of high-speed adders. In this paper, a hybrid Ling carry-select adder is presented. It is shown how a carry-select output stage can be used to eliminate the entire conversion of all pseudo-carries. The adder is implemented in enhanced multiple output domino logic (EMODL). A technique is presented to avoid false discharge paths, which present impairment to EMODL, in the sum selection multiplexer.
Keywords :
adders; carry logic; carry-select output stage; false discharge paths; high-speed adders; hybrid Ling carry-select adder; multiple output domino logic; pseudo-carries; sparse carry-lookahead tree; sum selection multiplexer; Adders; Concurrent computing; Delay; Digital systems; Logic; Multiplexing; Parallel algorithms; Signal generators;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on
Print_ISBN :
0-7803-8622-1
DOI :
10.1109/ACSSC.2004.1399376
