High input impedance active pixel sensing circuit with threshold voltage compensation implemented by dual-gate IGZO TFTs

Lu Sheng Chou, Chia Hung Chang, Hua Mao Chen, Ya-Hsiang Tai

Research output: Contribution to journalArticle

Abstract

The dual-gate TFT is biased at a preset status and store the threshold voltage information on the second gate. The reset TFT connecting to the sensing node can be omitted, and the high input impedance can be achieved. With this sensing circuit, the minimal charge can be sensitively amplified.

Original languageEnglish
Pages (from-to)1059-1061
Number of pages3
JournalDigest of Technical Papers - SID International Symposium
Volume44
Issue number1
DOIs
StatePublished - 1 Jan 2013

Keywords

  • active pixel sensor
  • dual-gate IGZO TFT
  • high input impedance

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