Title :
A 0.4V self-powered CMOS imager with 140dB dynamic range and energy harvesting
Author :
Chiou, Albert Yen-Chih ; Chih-Cheng Hsieh
Author_Institution :
Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
A 0.4V self-powered 96×96-pixel PWM imager is proposed and prototyped in standard 0.18μm CMOS technology. A dual-exposure extended-counting (DEEC) PWM sensor is developed to achieve a 140dB dynamic range with a boost of 53dB. The chip consumes 12.1μW at 12fps and 38.4μW at 60fps, results in an iFoM of 53.7 and 33.9 fJ/pixel.code, respectively. Optical energy harvesting (OEH) mode is implemented to generate 459mV and 3.21μW at 100klux (sunny day) and achieve a self-powered imaging at 15fps.
Keywords :
CMOS image sensors; energy harvesting; energy measurement; DEEC PWM sensor; OEH; dual-exposure extended-counting PWM sensor; gain 140 dB; gain 53 dB; optical energy harvesting; power 12.1 muW; power 3.21 muW; power 38.4 muW; self-powered CMOS imager; self-powered PWM imager; size 0.18 mum; voltage 0.4 V; voltage 459 mV; CMOS integrated circuits; Dynamic range; Energy harvesting; Optical imaging; Optical sensors; Pulse width modulation;
Conference_Titel :
VLSI Circuits (VLSI Circuits), 2015 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-86348-502-0
DOI :
10.1109/VLSIC.2015.7231333
