A 13.56 MHz CMOS ring oscillator for wireless power transfer receiver system

Author

Hyeonseok Hwang ; Byeonghak Jo ; Sechun Park ; Soo-won Kim ; Chan-Hui Jeong ; Junil Moon

Author_Institution

Dept. of Electr. Eng., Korea Univ., Seoul, South Korea

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

1

Lastpage

4

Abstract

A 13.56 MHz CMOS ring oscillator for DC/DC converter is demonstrated where measured performances make it suitable for wireless power transfer receiver system. The proposed structure employs a supply-regulated ring oscillator with a temperature compensated current bias circuit, which minimizes the frequency sensitivity to supply and temperature variations. Fabricated in a 0.11 μm 1P5M CMOS process, the developed oscillator as a switching frequency generator of DC/DC converter dissipates maximum 6.8 mW while exhibiting ±0.88 % frequency error against temperature variation of 0-125 °C.

Keywords

CMOS integrated circuits; DC-DC power convertors; compensation; power transmission; rings (structures); sensitivity analysis; voltage-controlled oscillators; 1P5M CMOS process; CMOS ring oscillator; DC-DC converter; VCO; frequency 13.56 MHz; frequency error; frequency sensitivity minimization; performance measurement; power 6.8 mW; size 0.11 mum; supply variations; supply-regulated ring oscillator; switching frequency generator; temperature 0 degC to 125 degC; temperature compensated current bias circuit; temperature variation; voltage controlled oscillators; wireless power transfer receiver system; CMOS integrated circuits; Frequency measurement; Resistors; Ring oscillators; Temperature measurement; Temperature sensors; clock generation; ring oscillator; temperature compensation; wireless power transfer;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2014 - 2014 IEEE Region 10 Conference

Conference_Location

Bangkok

ISSN

2159-3442

Print_ISBN

978-1-4799-4076-9

Type

conf

DOI

10.1109/TENCON.2014.7022380

Filename

7022380