Design of a low-power quaternary flip-flop based on dynamic differential logic

Akira Mochizuki, Hirokatsu Shirahama, Takahiro Hanyu

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A new static storage component, a quaternary flip-flop which consists of two-bit storage elements and three four-level voltage comparators, is proposed for a high-performance multiple-valued VLSI-processor datapath. A key circuit, a differential-pair circuit (DPC), is used to realize a high-speed multi-level voltage comparator. Since PMOS cross-coupled transistors are utilized as not only active loads of the DPC-based comparator but also parts of each storage element, the critical delay path of the proposed flip-flop can be shortened. Moreover, a dynamic logic style is also used to cut steady current paths through current sources in DPCs, which results in great reduction of its power dissipation. It is evaluated with HSPICE simulation in 0.18 μm CMOS that the power dissipations of the proposed quaternary flip-flop is reduced to 50 percent in comparison with that of a corresponding binary CMOS one.

Original languageEnglish
Pages (from-to)1591-1597
Number of pages7
JournalIEICE Transactions on Electronics
Issue number11
Publication statusPublished - 2006 Nov


  • Current-mode circuit
  • Differential-pair circuit
  • Dynamic logic
  • Multiple-valued logic


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