Fei Wang;Siyu Huang;Zhigang Wu;Cheng Ma;Xinyang Wang;Zeyu Cai
{"title":"A Low-Depth-Noise Indirect Time-of-Flight CMOS Image Sensor With Tap-Rotating Technique for Extended Range and Enhanced Imaging Quality","authors":"Fei Wang;Siyu Huang;Zhigang Wu;Cheng Ma;Xinyang Wang;Zeyu Cai","doi":"10.1109/LSSC.2024.3360243","DOIUrl":null,"url":null,"abstract":"An indirect time-of-flight (iToF) CMOS image sensor (CIS) has been designed with 65-nm pixel-level stacked backside-illuminated (BSI) CIS technology. By using an adaptable tap for ambient light detection, the sensor achieves a good balance between the depth noise and the detection range. The residual error caused by the mismatch among different taps is further reduced by a dedicated tap-rotating technique. It also features a multimachine interference suppression (MMIS) technique to further improve imaging quality. The sensor achieves a 0.29% depth noise over a 7-m detection range and 68-dB dynamic range with tap-rotating technique, while consuming only 80 mW of power.","PeriodicalId":13032,"journal":{"name":"IEEE Solid-State Circuits Letters","volume":"7 ","pages":"90-93"},"PeriodicalIF":2.2000,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Solid-State Circuits Letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10416874/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"COMPUTER SCIENCE, HARDWARE & ARCHITECTURE","Score":null,"Total":0}
引用次数: 0
Abstract
An indirect time-of-flight (iToF) CMOS image sensor (CIS) has been designed with 65-nm pixel-level stacked backside-illuminated (BSI) CIS technology. By using an adaptable tap for ambient light detection, the sensor achieves a good balance between the depth noise and the detection range. The residual error caused by the mismatch among different taps is further reduced by a dedicated tap-rotating technique. It also features a multimachine interference suppression (MMIS) technique to further improve imaging quality. The sensor achieves a 0.29% depth noise over a 7-m detection range and 68-dB dynamic range with tap-rotating technique, while consuming only 80 mW of power.