Title :
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
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;
Conference_Titel :
TENCON 2014 - 2014 IEEE Region 10 Conference
Conference_Location :
Bangkok
Print_ISBN :
978-1-4799-4076-9
DOI :
10.1109/TENCON.2014.7022380
