べき指数値を可変できるべき乗変換回路の信号ダイナミックレンジ拡大

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2022/01/01

タイトル(英語): Signal Dynamic Range Expansion for Exponentiation Conversion Circuit Capable of Changing the Power Exponent to Any Value

著者名: 新井　将広（（株）ジーシー），西山　直哉（東洋大学大学院 理工学研究科 電気電子情報専攻），佐野　勇司（東洋大学大学院 理工学研究科 電気電子情報専攻）

著者名(英語): Masahiro Arai (GC Inc.), Naoya Nishiyama (Graduate School of Science and Engineering, Course of Electricity, Electronics and Communications, Toyo University), Yuji Sano (Graduate School of Science and Engineering, Course of Electricity, Electronics and Communications, Toyo University)

キーワード: 信号変換回路，サブスレッショルド，非線形補正，IoT，べき乗関数　　signal conversion circuit，subthreshold，nonlinearity compensation，IoT，exponentiation function

要約(英語): In order to compensate for the non-linearity of the electronic device, an exponentiation conversion circuit that can change the power exponent to any value has been proposed. The exponentiation conversion circuit multiplies the logarithmically converted input signal by the power exponent value to perform exponential conversion. As a result, we can obtain the power function characteristic of the power exponent value. This circuit is a small-scale circuit that utilizes the exponential characteristics of the MOSFET subthreshold region. In the conventional circuit, expansion of the signal dynamic range has been an issue. In this paper, it was confirmed by simulation that the signal dynamic range is expanded by optimizing the current density of MOSFETs. In addition, the linearity of the multiplication circuit was improved by introducing operational amplifier. By evaluating its prototype IC with 0.6 μm CMOS process, we confirmed the signal dynamic range was expanded from 6.90 dB to 36.7 dB in current signal input and, the power exponent value can change in the range of -0.068 to 6.2.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.142 No.1 （2022） 特集：電子回路関連技術

本誌掲載ページ: 15-24 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/142/1/142_15/_article/-char/ja/