Efficiency enhancement technique for feed-forward amplifier using negative group delay circuit

Kazuhisa Yamauchi*, Hifumi Noto, Akira Inoue, Moriyasu Miyazaki

*この研究の対応する著者

研究成果: Paper査読

抄録

We present a design and an implementation of a multistage negative group delay circuit. It is small in size and has a compact circuit. Each stage of the multistage circuit is composed of three lumped resonators with resisters. To obtain the good reflection, the resonators are arranged in the π circuit. We discuss the principle of the negative group delay circuit and apply the circuit to the feed-forward amplifier. The delay line of the distortion cancellation loop is shortened 40% by connecting the circuit to the driver stage of the error amplifier. The efficiency of the feed-forward amplifier has been improved from 9% to 12%.

本文言語English
ページ139-142
ページ数4
DOI
出版ステータスPublished - 2008
外部発表はい
イベント2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008 - Chiba, Japan
継続期間: 2008 3月 42008 3月 6

Conference

Conference2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008
国/地域Japan
CityChiba
Period08/3/408/3/6

ASJC Scopus subject areas

  • 人工知能
  • 電子工学および電気工学
  • 電子材料、光学材料、および磁性材料
  • 通信

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