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A Tileable CMOS X-Ray Line Detector Using Time-Delay-Integration With Pseudomultisampling for Large-Sized Dental X-Ray Imaging Systems

Title
A Tileable CMOS X-Ray Line Detector Using Time-Delay-Integration With Pseudomultisampling for Large-Sized Dental X-Ray Imaging Systems
Author
권오경
Keywords
CMOS image sensor (CIS); CMOS X-ray detector; pseudomultisampling (PMS); time-delay-integration (TDI)
Issue Date
2017-01
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON ELECTRON DEVICES, v. 64, no. 1, page. 211-216
Abstract
This paper presents a low-power and lownoise tileable CMOS X-ray line detector with time-delay-integration (TDI) for large-sized dental X-ray imaging systems. The proposed X-ray line detector with TDI adopts pseudomultisampling (PMS) using shifted clocks for the single-slope analog-to-digital converter (ADC) to reduce the required clock cycles for the ADC. The reduced clock cycle decreases the dynamic power and power fluctuation to ensure power stability for large-sized X-ray detectors. The TDI X-ray line detector with PMS was fabricated using 0.18-mu m CMOS image sensor process technology with a stitching process, which has an image format of 1010 x 86 and a pixel size of 75 mu m x 75 mu m. The X-ray line detectors are tiled with 1 x 2 and 1 x 3 arrays to enlarge the active areas for dentalpanoramic and cephalometric X-ray imaging systems, respectively. The measurement results show the random noise of 0.43 LSB and a dynamic range of 78.5 dB, when the number of TDI stages is 86 and the number of PMS steps is 4. The dynamic current and power consumption per ADC are reduced from 157.4 mu A and 283.32 mu W to 41.2 mu A and 74.16 mu W, respectively, when PMS is adopted for TDI.
URI
https://ieeexplore.ieee.org/document/7774983http://repository.hanyang.ac.kr/handle/20.500.11754/112356
ISSN
0018-9383; 1557-9646
DOI
10.1109/TED.2016.2632131
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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