Low power latch based design with smart retiming

Authors: Singh, K. and Jiao, H. and Huisken, J. and Fatemi, H. and de Gyvez, J. P.

Abstract::Flip-flops and latches are two options to construct pipelines in digital integrated circuits (ICs). In this paper, the implications for converting a flip-flop based design to a latch-based design are investigated by performing timing and power analysis. Design flows are also proposed to convert a flip-flop based design to a latch-based design as well as a latch/flip-flop-mixed design. With a new retiming strategy, the optimum operating condition is identified for both the latch based design and the mixed design, where the maximum time borrowing or performance enhancement can be obtained. Compared to the flip-flop based design, 48% and 45% frequency boosting are achieved by the latch based design and the mixed design, respectively. While maintaining the same performance as the flip-flop based design with the aid of supply voltage scaling, the latch based design and the mixed design reduce the power consumption by 21% and 16%, respectively, in an industrial 28-nm FDSOI CMOS technology.

[BibTeX] [ DOI]
@inproceedings{Singh2018,
  author = {{Singh}, K. and {Jiao}, H. and {Huisken}, J. and {Fatemi}, H. and {de Gyvez}, J. P.},
  booktitle = {19th International Symposium on Quality Electronic Design (ISQED)},
  title = {Low power latch based design with smart retiming},
  year = {2018},
  volume = {},
  number = {},
  pages = {329-334},
  keywords = {CMOS integrated circuits;digital integrated circuits;flip-flops;logic design;low-power electronics;silicon-on-insulator;flip-flop based design;low power latch based design;smart retiming;digital integrated circuits;timing power analysis;latch-flip-flop-mixed design;FDSOI CMOS technology;power consumption;size 28 nm;Si;Latches;Power demand;Clocks;Timing;Pipelines;Integrated circuits;Flip-flops;Latch;flip-flop;voltage scaling;time borrowing;power consumption},
  doi = {10.1109/ISQED.2018.8357308},
  issn = {},
  url = {https://research.tue.nl/files/99956387/singhlow2018.pdf},
  month = mar
}