A PFM-Based Calibration Method for Low-Power High-Linearity Digital Pixel
The nonlinearity problem of digital pixels restricts the reduction in power consumption at the pixel-level circuit. The main cause of nonlinearity is discussed in this article and low power consumption is attained by reducing the static current in capacitive transimpedance amplifiers (CTIAs) and com...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/25/1/252 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841548929869545472 |
|---|---|
| author | Yu Cheng Jionghan Liu Xiyuan Wang Hongyu Hou Qian Jiang Yuchun Chang |
| author_facet | Yu Cheng Jionghan Liu Xiyuan Wang Hongyu Hou Qian Jiang Yuchun Chang |
| author_sort | Yu Cheng |
| collection | DOAJ |
| description | The nonlinearity problem of digital pixels restricts the reduction in power consumption at the pixel-level circuit. The main cause of nonlinearity is discussed in this article and low power consumption is attained by reducing the static current in capacitive transimpedance amplifiers (CTIAs) and comparators. Linearity was successfully improved through the use of an off-chip calibration method. A 64 × 64 array prototype digital readout integrated circuit (DROIC) was fabricated using a 0.18 μm 1P6M CMOS process. Experimental results indicated that the post-calibration linearity reached 99.6% with an input current of up to 1.5 μA. The static power consumption per digital pixel was 6 μW. |
| format | Article |
| id | doaj-art-7d1b3c1fced54c3e9f907f9ad902c6c5 |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-7d1b3c1fced54c3e9f907f9ad902c6c52025-01-10T13:21:22ZengMDPI AGSensors1424-82202025-01-0125125210.3390/s25010252A PFM-Based Calibration Method for Low-Power High-Linearity Digital PixelYu Cheng0Jionghan Liu1Xiyuan Wang2Hongyu Hou3Qian Jiang4Yuchun Chang5School of Integrated Circuits, Dalian University of Technology, Dalian 116000, ChinaSchool of Integrated Circuits, Dalian University of Technology, Dalian 116000, ChinaSchool of Integrated Circuits, Dalian University of Technology, Dalian 116000, ChinaSchool of Integrated Circuits, Dalian University of Technology, Dalian 116000, ChinaSchool of Integrated Circuits, Dalian University of Technology, Dalian 116000, ChinaSchool of Integrated Circuits, Dalian University of Technology, Dalian 116000, ChinaThe nonlinearity problem of digital pixels restricts the reduction in power consumption at the pixel-level circuit. The main cause of nonlinearity is discussed in this article and low power consumption is attained by reducing the static current in capacitive transimpedance amplifiers (CTIAs) and comparators. Linearity was successfully improved through the use of an off-chip calibration method. A 64 × 64 array prototype digital readout integrated circuit (DROIC) was fabricated using a 0.18 μm 1P6M CMOS process. Experimental results indicated that the post-calibration linearity reached 99.6% with an input current of up to 1.5 μA. The static power consumption per digital pixel was 6 μW.https://www.mdpi.com/1424-8220/25/1/252PFMdigital pixelDROICPbSe |
| spellingShingle | Yu Cheng Jionghan Liu Xiyuan Wang Hongyu Hou Qian Jiang Yuchun Chang A PFM-Based Calibration Method for Low-Power High-Linearity Digital Pixel Sensors PFM digital pixel DROIC PbSe |
| title | A PFM-Based Calibration Method for Low-Power High-Linearity Digital Pixel |
| title_full | A PFM-Based Calibration Method for Low-Power High-Linearity Digital Pixel |
| title_fullStr | A PFM-Based Calibration Method for Low-Power High-Linearity Digital Pixel |
| title_full_unstemmed | A PFM-Based Calibration Method for Low-Power High-Linearity Digital Pixel |
| title_short | A PFM-Based Calibration Method for Low-Power High-Linearity Digital Pixel |
| title_sort | pfm based calibration method for low power high linearity digital pixel |
| topic | PFM digital pixel DROIC PbSe |
| url | https://www.mdpi.com/1424-8220/25/1/252 |
| work_keys_str_mv | AT yucheng apfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT jionghanliu apfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT xiyuanwang apfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT hongyuhou apfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT qianjiang apfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT yuchunchang apfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT yucheng pfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT jionghanliu pfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT xiyuanwang pfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT hongyuhou pfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT qianjiang pfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel AT yuchunchang pfmbasedcalibrationmethodforlowpowerhighlinearitydigitalpixel |