DocumentCode :
726968
Title :
An output feedback-based start-up technique with automatic disabling for battery-less energy harvesters
Author :
Das, Abhik ; Gao, Yuan ; Kim, Tony Tae-Hyoung
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
fYear :
2015
fDate :
24-27 May 2015
Firstpage :
233
Lastpage :
236
Abstract :
This paper presents a start-up circuit based upon output voltage feedback for thermal energy harvesting. The feedback loop consisting of an output load, a boost converter core, a charge-pump-based doubler and a CMOS inverter switch to track the output voltage and generate a reset signal to kickstart the boost converter. The proposed start-up circuit shows a remarkably improved start-up time of 35μs at the input voltage of 290mV. The start-up circuit is automatically disabled after the boost converter reaches steady-state. Only one off-chip component is required, improving the cost efficiency. The proposed start-up circuit consumes 3.2nW during the steady state, aiding the boost converter to achieve an efficiency of 77% at input voltage of 290mV. It was designed in standard 65-nm CMOS process technology and occupies the area of 0.072mm2.
Keywords :
CMOS integrated circuits; charge pump circuits; energy harvesting; feedback; power convertors; starting; CMOS inverter switch; CMOS process technology; automatic disabled; batteryless energy harvester; boost converter core; charge pump-based doubler; feedback loop; off-chip component; output feedback-based start-up technique; power 3.2 nW; size 65 nm; start-up circuit; thermal energy harvesting; time 35 mus; voltage 290 mV; voltage tracking; CMOS integrated circuits; Capacitors; Energy harvesting; Inverters; Steady-state; Switching circuits; Transistors; disable; efficiency; energy harvesting; start-up; steady-state;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems (ISCAS), 2015 IEEE International Symposium on
Conference_Location :
Lisbon
Type :
conf
DOI :
10.1109/ISCAS.2015.7168613
Filename :
7168613
Link To Document :
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