A Forward/Reverse Body Bias Generator with Wide Supply-Range down to Threshold Voltage

• KAMAE Norihiro

  Kyoto University

• TSUCHIYA Akira

  Kyoto University

• ONODERA Hidetoshi

  Kyoto University

Abstract

A forward/reverse body bias generator (BBG) which operates under wide supply-range is proposed. Fine-grained body biasing (FGBB) is effective to reduce variability and increase energy efficiency on digital LSIs. Since FGBB requires a number of BBGs to be implemented, simple design is preferred. We propose a BBG with charge pumps for reverse body bias and the BBG operates under wide supply-range from 0.5 V to 1.2 V. Layout of the BBG was designed in a cell-based flow with an AES core and fabricated in a 65 nm CMOS process. Area of the AES core is 0.22 mm² and area overhead of the BBG is 2.3%. Demonstration of the AES core shows a successful operation with the supply voltage from 0.5 V to 1.2 V which enables the reduction of power dissipation, for example, of 17% at 400 MHz operation.

Journal

• IEICE Transactions on Electronics

  IEICE Transactions on Electronics E98.C (6), 504-511, 2015

  The Institute of Electronics, Information and Communication Engineers

Keywords

• body bias generator
• dynamic voltage frequency scaling
• low supply voltage
• analog-assisted digital
• switched-capacitor circuits

Details

• CRID: 1390282679355271936
• NII Article ID: 130005072389
• NII Book ID: AA10826283
• DOI: 10.1587/transele.e98.c.504
• ISSN: 17451353
• ISSN: 09168524
• HANDLE: 2433/201406
• Web Site: https://www.jstage.jst.go.jp/article/transele/E98.C/6/E98.C_504/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed