Title :
A battery-free 225 nW buck converter for wireless RF energy harvesting with dynamic on/off time and adaptive phase lead control
Author :
Hsieh, Chun-Yu ; Lee, Yu-Huei ; Yang, Yao-Yi ; Huang, Tzu-Chi ; Chen, Ke-Horng ; Huang, Chen-Chih ; Lin, Ying-Hsi
Author_Institution :
Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A battery-free 225 nW buck converter is implemented by using 0.25-μm CMOS process with die area of 0.21 mm2. The dynamic on/off time (DOOT) technique can predict the on/off time at different input voltage, as well as suppress static power in the idle period. In addition, the adaptive phase lead mechanism can improve the initial delay from the comparator and improve load regulation by 60 mV.
Keywords :
CMOS integrated circuits; comparators (circuits); power convertors; radiofrequency integrated circuits; CMOS process; DOOT technique; adaptive phase lead control; battery-free buck converter; comparator; delay; dynamic on/off time; load regulation; power 225 nW; size 0.25 mum; static power; voltage 60 mV; wireless RF energy harvesting; Current measurement; Inductors; Power transistors; Radio frequency; Threshold voltage; Wireless communication; Wireless sensor networks;
Conference_Titel :
VLSI Circuits (VLSIC), 2011 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-61284-175-5
