High efficiency CMOS rectifier circuit with self-Vth-cancellation and power regulation functions for UHF RFIDs

Koji Kotani, Takashi Ito

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

110 Citations (Scopus)

Abstract

High efficiency CMOS rectifier circuit for UHF RFID applications has been developed. The rectifier utilizes self Vth cancellation (SVC) scheme in which threshold voltage of MOSFETs is cancelled by applying gate bias voltage generated by output voltage of the rectifier itself. Very simple circuit configuration and no power dissipation feature of the scheme enable excellent power conversion efficiency (PCE) especially in small RF input power conditions. At higher RF input power conditions, PCE of the rectifier automatically decreases. This is the built-in self-power-regulation function. Proposed SVC CMOS rectifier has been fabricated with 0.35μm CMOS process and the measured performance has been compared with other types of rectifiers. The SVC CMOS rectifier achieves 29% PCE at -9.9dBm RF input power condition. This PCE is larger than ever reported rectifiers under the condition.

Original languageEnglish
Title of host publication2007 IEEE Asian Solid-State Circuits Conference, A-SSCC
Pages119-122
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 IEEE Asian Solid-State Circuits Conference, A-SSCC - Jeju, Korea, Republic of
Duration: 2007 Nov 122007 Nov 14

Publication series

Name2007 IEEE Asian Solid-State Circuits Conference, A-SSCC

Other

Other2007 IEEE Asian Solid-State Circuits Conference, A-SSCC
CountryKorea, Republic of
CityJeju
Period07/11/1207/11/14

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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