Energy-harvesting circuits with a high-efficiency rectifier and a low temperature coefficient bandgap voltage reference

Shuenn Yuh Lee, Zhan Xian Liao, Chih Hung Lee

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this paper, a high-efficiency rectifier and a low temperature coefficient (TC) bandgap voltage reference (BGR) in energy-harvesting circuits are presented. The audio signal generated from smartphone is used to verify the energy-harvesting circuits that are composed of a full-wave low-voltage active rectifier, a low-dropout (LDO) regulator, and a current-mode BGR circuit. An active diode and a proposed AVC are presented to enhance the rectifier efficiency. The rectifier output voltage is regulated by an LDO close to a stable 1.2-V supply voltage in a 0.18-\mu \text{m} 1P6M Taiwan Semiconductor Manufacturing Company standard complementary metal-oxide-semiconductor (CMOS) process. A curvature-compensation technique is proposed to improve the TC of the BGR, and the best TC of 15.33 ppm/°C between the temperature range of -10 °C and 120 °C is measured. The measured rectifier achieves the maximum power conversion efficiency (PCE) of 87.2% under 1.77~V{\mathrm {pp}} ac input signal with 2- \text{k}\Omega output load resistance. The measured results demonstrate the better characteristic of the rectifier and BGR than that of previous works using the low-power structure.

Original languageEnglish
Article number8695865
Pages (from-to)1760-1767
Number of pages8
JournalIEEE Transactions on Very Large Scale Integration (VLSI) Systems
Volume27
Issue number8
DOIs
Publication statusPublished - 2019 Aug

All Science Journal Classification (ASJC) codes

  • Software
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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