A low noise, high power efficiency supply regulator for near-field power delivery

Peter Harrington, Sudipto Chakraborty, Bertan Bakkaloglu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to deliver near-field electromagnetic power to a biomedical device or an RFID tag efficiently, the downlink signal is preferred to be at a high voltage level. To reduce power consumption and meet low supply requirements, it is advantageous for the remote device power supply to step-down the input voltage following rectification, typically using switch-mode regulators. The output ripple of a switched capacitor converter is inversely proportional to the filtering capacitance at the output node and switching frequency. In this paper, a hybrid DC-DC converter utilizing a switched capacitor regulator in master-slave configuration with a linear regulator is presented. Linear regulator actively cancels the switching ripple, while low frequency and DC current is provided by the switched capacitor converter. The converter is designed to receive an average input voltage of 5 Vpk from the receiver coil, with an output voltage of 2 V, and 5 mA of output current. The proposed regulator is fabricated in 0.35 μm technology. The power efficiency is measured to be 67%, with a nominal peak to peak ripple of less than 2 mV at the output.

Original languageEnglish (US)
Pages (from-to)177-187
Number of pages11
JournalAnalog Integrated Circuits and Signal Processing
Volume66
Issue number2
DOIs
StatePublished - Feb 2011

Fingerprint

Capacitors
Electric potential
Switching frequency
DC-DC converters
Radio frequency identification (RFID)
Electromagnetic fields
Electric power utilization
Capacitance
Switches

Keywords

  • Linear regulators
  • Power transmission efficiency
  • RF link
  • Switched capacitor DC-DC step-down converter

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Hardware and Architecture
  • Signal Processing

Cite this

A low noise, high power efficiency supply regulator for near-field power delivery. / Harrington, Peter; Chakraborty, Sudipto; Bakkaloglu, Bertan.

In: Analog Integrated Circuits and Signal Processing, Vol. 66, No. 2, 02.2011, p. 177-187.

Research output: Contribution to journalArticle

@article{58a944296e6344208bdf7688bb6fee54,
title = "A low noise, high power efficiency supply regulator for near-field power delivery",
abstract = "In order to deliver near-field electromagnetic power to a biomedical device or an RFID tag efficiently, the downlink signal is preferred to be at a high voltage level. To reduce power consumption and meet low supply requirements, it is advantageous for the remote device power supply to step-down the input voltage following rectification, typically using switch-mode regulators. The output ripple of a switched capacitor converter is inversely proportional to the filtering capacitance at the output node and switching frequency. In this paper, a hybrid DC-DC converter utilizing a switched capacitor regulator in master-slave configuration with a linear regulator is presented. Linear regulator actively cancels the switching ripple, while low frequency and DC current is provided by the switched capacitor converter. The converter is designed to receive an average input voltage of 5 Vpk from the receiver coil, with an output voltage of 2 V, and 5 mA of output current. The proposed regulator is fabricated in 0.35 μm technology. The power efficiency is measured to be 67{\%}, with a nominal peak to peak ripple of less than 2 mV at the output.",
keywords = "Linear regulators, Power transmission efficiency, RF link, Switched capacitor DC-DC step-down converter",
author = "Peter Harrington and Sudipto Chakraborty and Bertan Bakkaloglu",
year = "2011",
month = "2",
doi = "10.1007/s10470-010-9511-7",
language = "English (US)",
volume = "66",
pages = "177--187",
journal = "Analog Integrated Circuits and Signal Processing",
issn = "0925-1030",
publisher = "Springer Netherlands",
number = "2",

}

TY - JOUR

T1 - A low noise, high power efficiency supply regulator for near-field power delivery

AU - Harrington, Peter

AU - Chakraborty, Sudipto

AU - Bakkaloglu, Bertan

PY - 2011/2

Y1 - 2011/2

N2 - In order to deliver near-field electromagnetic power to a biomedical device or an RFID tag efficiently, the downlink signal is preferred to be at a high voltage level. To reduce power consumption and meet low supply requirements, it is advantageous for the remote device power supply to step-down the input voltage following rectification, typically using switch-mode regulators. The output ripple of a switched capacitor converter is inversely proportional to the filtering capacitance at the output node and switching frequency. In this paper, a hybrid DC-DC converter utilizing a switched capacitor regulator in master-slave configuration with a linear regulator is presented. Linear regulator actively cancels the switching ripple, while low frequency and DC current is provided by the switched capacitor converter. The converter is designed to receive an average input voltage of 5 Vpk from the receiver coil, with an output voltage of 2 V, and 5 mA of output current. The proposed regulator is fabricated in 0.35 μm technology. The power efficiency is measured to be 67%, with a nominal peak to peak ripple of less than 2 mV at the output.

AB - In order to deliver near-field electromagnetic power to a biomedical device or an RFID tag efficiently, the downlink signal is preferred to be at a high voltage level. To reduce power consumption and meet low supply requirements, it is advantageous for the remote device power supply to step-down the input voltage following rectification, typically using switch-mode regulators. The output ripple of a switched capacitor converter is inversely proportional to the filtering capacitance at the output node and switching frequency. In this paper, a hybrid DC-DC converter utilizing a switched capacitor regulator in master-slave configuration with a linear regulator is presented. Linear regulator actively cancels the switching ripple, while low frequency and DC current is provided by the switched capacitor converter. The converter is designed to receive an average input voltage of 5 Vpk from the receiver coil, with an output voltage of 2 V, and 5 mA of output current. The proposed regulator is fabricated in 0.35 μm technology. The power efficiency is measured to be 67%, with a nominal peak to peak ripple of less than 2 mV at the output.

KW - Linear regulators

KW - Power transmission efficiency

KW - RF link

KW - Switched capacitor DC-DC step-down converter

UR - http://www.scopus.com/inward/record.url?scp=79951580502&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79951580502&partnerID=8YFLogxK

U2 - 10.1007/s10470-010-9511-7

DO - 10.1007/s10470-010-9511-7

M3 - Article

AN - SCOPUS:79951580502

VL - 66

SP - 177

EP - 187

JO - Analog Integrated Circuits and Signal Processing

JF - Analog Integrated Circuits and Signal Processing

SN - 0925-1030

IS - 2

ER -