DocumentCode :
2323273
Title :
High-speed and low-power serial accumulator for serial/parallel multiplier
Author :
Meher, Manas Ranjan ; Jong, Ching-Chuen ; Chang, Chip-Hong
Author_Institution :
Centre for Integrated Circuits & Syst., Nanyang Technol. Univ., Singapore
fYear :
2008
fDate :
Nov. 30 2008-Dec. 3 2008
Firstpage :
176
Lastpage :
179
Abstract :
This paper presents a new approach to serial/parallel multiplier design by using parallel 1psilas counters to accumulate the binary partial product bits. The 1psilas in each column of the partial product matrix due to the serially input operands are accumulated using a serial T-flip flop (TFF) counter. Consequently, the column height is reduced from N to [log2 N]+1. This logarithmic reduction results in a very small carry save adder (CSA) array or tree required before the two final summands are added up to obtain the final product. The counters can be clocked at very high frequency (around 1.5 GHz as dictated mainly by the TFF propagation delay) and the accumulation frequency is independent of the operand size. The proposed accumulation method achieves 33%, 38%, 43% gain in speed respectively for 31, 63, 127 operands accumulators and on average 42% reduction in power consumption over CSA based accumulation implemented in 0.18 mum CMOS technology.
Keywords :
adders; carry logic; flip-flops; multiplying circuits; CMOS technology; CSA based accumulation; TFF propagation delay; binary partial product bits; carry save adder array; high-speed serial accumulator; low-power serial accumulator; partial product matrix; serial T-flip flop counter; serial-parallel multiplier; Adders; CMOS technology; Counting circuits; Design engineering; Digital signal processing chips; Energy consumption; Frequency; High speed integrated circuits; Integrated circuit technology; Propagation delay;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
Type :
conf
DOI :
10.1109/APCCAS.2008.4745989
Filename :
4745989
Link To Document :
بازگشت