Title :
A 33 × 25 µm2 low-power range finder
Author :
Davidovic, Milos ; Hofbauer, Michael ; Zimmermann, Horst
Author_Institution :
Inst. of Electrodynamics, Microwave & Circuit Eng., Vienna Univ. of Technol., Vienna, Austria
Abstract :
Within this paper a time-of-flight single-pixel range finding sensor is presented. The sensor is fabricated in a standard 180 nm 1P6M CMOS process, occupying a total active area of 33 × 25 μm2, at a fill factor of ~ 55%. The pixel power consumption is reduced to 900 nW, facilitating the current domain ambient light (AL) suppression at the same time. Measurement results show a standard deviation of 7 mm at 1.2 m and below 5.2 cm for a range up to 3.2 m. The AL immunity is characterized up to 180 klx, demonstrating a distance deviation within 4 cm.
Keywords :
CMOS image sensors; distance measurement; 1P6M CMOS process; 3D camera; AL immunity; current domain AL suppression; current domain ambient light suppression; low-power range finder; pixel power consumption; power 900 nW; real time distance measurement devices; size 180 nm; standard deviation; time-of-flight single-pixel range finding sensor; Accuracy; CMOS process; Capacitors; Optical sensors; Optical variables measurement; Photodiodes; Standards; 3D camera; TOF sensor; ambient light suppression; low-power;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6272194
