Power Reduction by Flip Flop Merging Technique Using Heuristic Algorithm
Power consumed by clocking has taken a major part of the whole design circuit. Given a design, we can reduce its power consumption by replacing several flip-flops with some multi-bit flip-flop. This may affect the performance of the original circuit because of its timing and placement capacity constraints. To overcome this problem efficiently, a technique combination table is built to enumerate possible combinations of flip-flops provided by a library. Finally, merging of flip-flops is done with help of co-ordination transformation and combination table. We can achieve better area reduction and power reduction by 37.65%. The implementation of flip flop merging is done in MODELSIM software and the power analysis through Quartus II.
H. Kawagachi and T. Sakurai, “A reduced clock-swing flip-flop (RCSFF) for 63% clock power reduction,” in VLSI Circuits Dig. Tech. PapersSymp., Jun. 1997, pp. 97–98.
C.Chunhong, K. Changjun, and M. Sarrafzadeh, “Activity-sensitive clock tree construction for low power,” in Proc. Int. Symp. Low PowerElectron. Design, 2002, pp. 279–282.
D.Duarte, V. Narayanan, and M. J. Irwin, “Impact of technology is scaling in the clock power,” in Proc.IEEE VLSI Comput. Soc. Annu. Symp., Pittsburgh, PA, Apr. 2002, pp. 52–57.
M. Donno, E. Macii, and L. Mazzoni,“Power-aware clock tree planning,”in Proc. Int. Symp. Phys. Design, 2004, pp. 138–147.
W. Aloisi and R. Mita, “Gated-clock design of linear-feedback shiftregisters,” IEEE Trans. Circuits Syst., II, Brief Papers, vol. 55, no. 5,pp. 546–550, Jun. 2008.
Y.-T.Chang, C.-C.Hsu, P.-H.Lin, Y.-W.Tsai, and S.-F. Chen, “Post-placement power optimization with multi-bit flip-flops,” in Proc.IEEE/ACM Comput.-Aided Design Int. Conf., San Jose, CA, Nov. 2010, pp. 218–223.
S. Wimer and I. Koren,“The Optimal fan-out of clock network for power minimization by adaptive gating,” IEEE Trans. Very Large ScaleIntegr. (VLSI) Syst., vol. 20, no. 10, pp. 1772–1780, Oct. 2012.
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.