Browsing by Author "Karim, Karim S."

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LTPS Active Pixel Circuit With Threshold Voltage Compensation for X-Ray Imaging Applications
(2019-10-01)
Tai, Ya-Hsiang
;
Lin, Chi-Hao
;
Yeh, Shan
;
Tu, Cheng-Che
;
Karim, Karim S.
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.