LTPS Active Pixel Circuit with Threshold Voltage Compensation for X-Ray Imaging Applications

Ya Hsiang Tai, Chi Hao Lin*, Shan Yeh, Cheng Che Tu, Karim S. Karim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In this article, we proposed a low-temperature poly-silicon (LTPS) active pixel sensor (APS) circuit with threshold voltage ( {V}{{th}} ) compensation. LTPS thin-film transistors (TFTs) are known to degrade under long-term irradiation and this is quantified. Simulation results and experimental data confirm that the proposed APS circuit compensates the instability of LTPS TFTs and is a promising, high-performance alternative to current amorphous silicon (a-Si) pixel-based X-ray detectors.

Original languageEnglish
Article number8798676
Pages (from-to)4216-4220
Number of pages5
JournalIEEE Transactions on Electron Devices
Volume66
Issue number10
DOIs
StatePublished - Oct 2019

Keywords

  • Active pixel sensor (APS)
  • LTPS
  • thin-film transistor (TFT)
  • threshold voltage compensation
  • X-ray imager

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