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DC Field | Value | Language |
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dc.citation.endPage | 2865 | - |
dc.citation.number | 11 | - |
dc.citation.startPage | 2849 | - |
dc.citation.title | IEEE JOURNAL OF SOLID-STATE CIRCUITS | - |
dc.citation.volume | 55 | - |
dc.contributor.author | Kim, Donguk | - |
dc.contributor.author | Lee, Seunghyun | - |
dc.contributor.author | Park, Dahwan | - |
dc.contributor.author | Piao, Canxing | - |
dc.contributor.author | Park, Jihoon | - |
dc.contributor.author | Ahn, Yeonsoo | - |
dc.contributor.author | Cho, Kihwan | - |
dc.contributor.author | Shin, Jungsoon | - |
dc.contributor.author | Song, Seung Min | - |
dc.contributor.author | Kim, Seong-Jin | - |
dc.contributor.author | Chun, Jung-Hoon | - |
dc.contributor.author | Choi, Jaehyuk | - |
dc.date.accessioned | 2023-12-21T16:43:08Z | - |
dc.date.available | 2023-12-21T16:43:08Z | - |
dc.date.created | 2020-12-06 | - |
dc.date.issued | 2020-11 | - |
dc.description.abstract | This article presents a 320 x 240 indirect time-offlight (iToF) CMOS image sensor (CIS) with on-chip motion artifact suppression and background light cancelling (BGLC). The proposed iToF CIS uses a backside-illuminated trident pinned photodiode (PPD) that assists charge transfer with a built-in lateral electric field for enhanced depth accuracy. To overcome the limitation of the conventional iToF CIS that exhibits motion artifact, we propose a pseudo-four-tap (P4-tap) demodulation method with alternate phase driving using a conventional two-tap pixel structure with a high fill factor of over 43%. In addition, by combining the advantages of both the P4-tap and conventional two-tap demodulation schemes, we propose hybrid depth imaging with reduced motion artifact for moving objects, while providing high-depth precision for the static background. For outdoor mobile applications of the iToF CIS, we integrated on-chip BGLC circuits to eliminate the BGL-induced depth error. A prototype chip is fabricated using a 90-nm backside illumination (BSI) CIS process. The BSI trident PPD enabled a low depth error of under 0.54% over the range of 0.75-4 m, with a modulation frequency of 100 MHz. Motion artifact was suppressed at 60 frames/s of hybrid depth imaging owing to the proposed P4-tap scheme. With the on-chip BGLC circuit, the experimental results demonstrate a 0.55% depth error at a 1-m distance, even under 120-klx BGL illumination. | - |
dc.identifier.bibliographicCitation | IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.55, no.11, pp.2849 - 2865 | - |
dc.identifier.doi | 10.1109/JSSC.2020.3021246 | - |
dc.identifier.issn | 0018-9200 | - |
dc.identifier.scopusid | 2-s2.0-85094877852 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/48839 | - |
dc.identifier.url | https://ieeexplore.ieee.org/document/9195738 | - |
dc.identifier.wosid | 000584274500002 | - |
dc.language | 영어 | - |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.title | Indirect Time-of-flight CMOS Image Sensor with On-chip Background Light Cancelling and Pseudo 4-Tap/2-Tap Hybrid Imaging for Motion Artifact Suppression | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.relation.journalResearchArea | Engineering | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Background light cancelling (BGLC) | - |
dc.subject.keywordAuthor | CMOS depth image sensor | - |
dc.subject.keywordAuthor | motion artifact suppression | - |
dc.subject.keywordAuthor | time-of-flight (ToF) sensor | - |
dc.subject.keywordAuthor | trident pinned photodiode (PPD) | - |
dc.subject.keywordPlus | PIXELS | - |
dc.subject.keywordPlus | NOISE | - |
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