A widely tunable CMOS Gm-C filter with a negative source degeneration resistor transconductor

Shinichi Hori, Tadashi Maeda, Hitoshi Yano, Noriaki Matsuno, Keiichi Numata, Nobuhide Yoshida, Yuji Takahashi, Tomoyuki Yamase, Robert Walkington, Hikaru Hida

研究成果: Conference article査読

47 被引用数 (Scopus)


We propose a new negative source degeneration resistor (NSDR) transconductor to achieve a wide continuous-tuning range gm-C filter applicable for IEEE802.11a/b/g wireless-LANs and W-CDMA. The NSDR-transconductor using a source degeneration resistor and positive feedback differential amplifier that acts as a negative resistor. This configuration enables the equivalent source degeneration resistance to be drastically increased without degrading linearity, thus resulting in a wide gm tuning. A 6th -order elliptic low-pass filter using this NSDR-transconductor exhibits a cutoff frequency (fc) tuning range of 1.5-12MHz, which is two times wider than that of conventional filters. Additionally, we introduce a new figure of merit (FoM) evaluating the basic filter performance. This filter shows 0.35 fj (FoM) in the IEEE802.11a mode, which is, to our best knowledge, the best value in the CMOS channel-select filters.

ジャーナルEuropean Solid-State Circuits Conference
出版ステータスPublished - 2003 12月 1
イベント29th European Solid-State Circuits Conference, ESSCIRC 2003 - Estoril, Portugal
継続期間: 2003 9月 162003 9月 18

ASJC Scopus subject areas

  • ハードウェアとアーキテクチャ
  • 電子工学および電気工学


「A widely tunable CMOS Gm-C filter with a negative source degeneration resistor transconductor」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。