New current attenuator circuit in the current mode FFT LSI for OFDM

S. K. Kim, S. Saigusa, Suguru Kameda, H. Nakase, K. Tsubouchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


To achieve the high performance of current-mode fast-Fourier-transform (FFT) large-scaled integration (LSI) for orthogonal frequency division multiplexing (OFDM) system, a new current-attenuator circuit without a DC offset-current error is proposed. The attainable maximum scale accuracy to the input current is theoretically -80 dB in the proposed attenuator circuit. The circuit consists of N-current mirrors simply connected in parallel with one another. The output current of the circuit is reduced to 1/N of the input current. The proposed circuit exerts high accuracy on the current attenuation and enables us to design the current-mode 64-point FFT LSI for OFDM system.

Original languageEnglish
Title of host publicationProceedings - APCCAS 2002
Subtitle of host publicationAsia-Pacific Conference on Circuits and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)0780376900
Publication statusPublished - 2002 Jan 1
EventAsia-Pacific Conference on Circuits and Systems, APCCAS 2002 - Denpasar, Bali, Indonesia
Duration: 2002 Oct 282002 Oct 31

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS


OtherAsia-Pacific Conference on Circuits and Systems, APCCAS 2002
CityDenpasar, Bali


  • Attenuators
  • Current mode circuits
  • Digital signal processing
  • Discrete Fourier transforms
  • Energy consumption
  • Large scale integration
  • Mirrors
  • OFDM
  • Wireless LAN
  • Wireless communication

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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