Correlated double sampling circuit integrated on glass used for active pixel sensing array

Yi Cheng Yuan, Cheng Che Tu, Ya Hsiang Tai

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

In recent years, promoting the sensing accuracy of the image pixel sensor has become a hot issue. For voltage type active pixel sensor (V-APS), the readout voltage, as well as the sensing signal, will be affected by the thin film transistors (TFTs) characteristic variation, especially the shift in threshold voltage (Vth). In this paper, we introduce a novel correlated double sampling (CDS) circuit, which can be implemented on glass by only using TFTs and capacitors. Thus, the readout voltage variation due to the threshold voltage shift under same light intensity illumination can be eliminated.

Original languageEnglish
Pages (from-to)1340-1343
Number of pages4
JournalDigest of Technical Papers - SID International Symposium
Volume52
Issue number1
DOIs
StatePublished - Jun 2021
Event58th International Symposium on Digest of Technical Papers, ICDT 2021 - Virtual, Online
Duration: 17 May 202121 May 2021

Keywords

  • Active pixel sensor
  • Correlated double sampling
  • Dynamic range
  • TFT
  • Threshold voltage variation

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