Browse > Article

High-Speed Dynamic Decimal Adder Design  

You, Young-Gap (Department of Information & Communication Engineering, Chungbuk Nat'l University)
Kim, Yong-Dae (Department of Information & Communication Engineering, Chungbuk Nat'l University)
Choi, Jong-Hwa (Department of Information & Communication Engineering, Chungbuk Nat'l University)
Publication Information
Abstract
This paper proposed a carry lookahead (CLA) circuitry design. It was based on dynamic circuit aiming at delay reduction in an addition of BCD coded decimal numbers. The performance of these decimal adders is analyzed demonstrating their speed improvement. Timing simulation on the proposed decimal addition circuit employing $0.18{\mu}m$ CMOS technology yielded the worst-case delay of 0.83 ns at 16-digit. The proposed scheme showed a speed improvement compared to several schemes for decimal addition.
Keywords
Decimal adder; Dynamic; CLA;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. You, Y. Kim and J. Choi, 'Dynamic decimal adder circuit design by using the carry lookahead,' Proc. Design and Diagnostics of Electronic Circuit and Systems, pp.244-246, Apr. 2006
2 J. Choi and Y. You, 'An excess-3 code carry lookahead design for high-speed decimal addition,' IEEK J., vol. 40 CI, no. 5, pp 241-249, Sept. 2003
3 R. K. Richards, Arithmetic Operations in Digital Computers. D. Vanostrand Company, Inc., 1955
4 M. S. Schmookler and A. Weinberger, 'High speed decimal addition,' IEEE Transactions on Computers, vol. C-20, no. 8, pp. 862-866, August 1971   DOI   ScienceOn
5 Ramchan Woo, Se-Joong Lee and Hoi-Jun Yoo, 'A 670 ps, Dynamic Low-Power Adder Design,' ISCAS 2000- IEEE International Symposium on Circuit and System, vol. 1, pp. 28-31, May 2000   DOI
6 R. J. Baker, H. W. Li, and D. E. Boyce, CMOS Circuit Design, Layout, and Simulation, IEEE PRESS, 1998, ch. 14
7 F. Busaba, C. Krygowski, E. Schwarz, W. Li and S. Carlough, 'IBM z900 Decimal Arithmetic Unit,' Proc. the 35th Asilomar Conf. on Signals, Systems, and Computers, pp. 1335-1339, Nov. 2001   DOI
8 S. Hermann, Decimal Computation, Wiley-Inter Science Publication, 1974
9 M. F. Cowlishaw, et al., 'A decimal floating-point specification,' Proc. 15th IEEE Symposium on Computer Arithmetic, pp. 147-154, June 2001   DOI
10 R. D. Kenney and M. J. Schulte, 'High-speed Multioperand decimal adders,' IEEE Transactions on Computers, vol. 54, no. 8, pp. 953-963, August 2005   DOI   ScienceOn
11 Bibliography of material on Decimal Arithmetic, http://www2.hursley.ibm.com/decimal/decifaq1.html, Sept. 2002