Photovoltaic-assisted CMOS rectifier circuit for synergistic energy harvesting from ambient radio wave

Koji Kotani, Takumi Bando, Yuki Sasaki

Research output: Contribution to conferencePaperpeer-review

10 Citations (Scopus)

Abstract

In this study, we realized efficient energy harvesting from ambient radio waves using a photovoltaic (PV) assisted CMOS rectifier. The rectifier operates truly synergistically. A p-n junction diode acting as a PV cell converts light energy to a dc bias voltage, which compensates the threshold voltage of the MOSFETs and enhances the RF to DC power conversion efficiency (PCE) of the rectifier even under extremely low input power condition. Under ambient light conditions, a PCE greater than 20% was achieved at an RF input power, frequency, and output load of -20 dBm, 920 MHz and 47 kΩ, respectively, which is twice the value obtained from a conventional rectifier without PV assistance.

Original languageEnglish
Pages329-332
Number of pages4
DOIs
Publication statusPublished - 2012 Dec 1
Event2012 IEEE Asian Solid-State Circuits Conference, A-SSCC 2012 - Kobe, Japan
Duration: 2012 Nov 122012 Nov 14

Other

Other2012 IEEE Asian Solid-State Circuits Conference, A-SSCC 2012
Country/TerritoryJapan
CityKobe
Period12/11/1212/11/14

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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