Low power current-cut S witched-current matched filter for CDMA

Kenji Togurat, Hiroyuki Nakase, Koji Kubota, Kazuya Mastj

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We have proposed a current-cut switchedcurrent matched filter (CC-SIMF) for direct-sequence codedivision multiple-access (DS-CDMA). The 256-chip CC-SIMF can achieve low power consumption of less than 10 mW under high-speed operation of more than 16 Mcps. To reduce the current transfer error accumulation, we propose a parallel SIMF configuration. A 128-chip SIMF using 0.8-/jm Complementally Metal Oxide Semiconductor (CMOS) process has been designed and fabricated. Optimization of the current memory cell structure has been described. The correlation operation at 16 Mcps has been obtained using a 128-chip orthogonal m-sequence. The code phase separation performance for path diversity has been clearly observed. The power consumption has been significantly reduced using the current-cut method.

Original languageEnglish
Pages (from-to)212-219
Number of pages8
JournalIEICE Transactions on Electronics
Issue number2
Publication statusPublished - 2001


  • Codedivision multiple-access (cdma)
  • Current-cut
  • Matched filter
  • Switched-current (si) circuit

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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