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A high dynamic range, high linearity CMOS current-mode image sensor for computed tomography

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5 Author(s)
Steadman, R. ; Philips Res. Labs., Aachen, Germany ; Vogtmeier, G. ; Kemna, A. ; Quossai, S.I.
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In this work, we show a high dynamic range current-mode detector for computer tomography application. A regulated current mirror structure has been implemented at pixel level that provides with 17 bits dynamic range and a noise floor below 3 pARMS. Non-linearity is kept below 2% and signal bandwidth is higher than 10 kHz. A test structure with 4×4 pixel array is presented is this paper. Both photodiode and current mode amplifier have been integrated into the same CMOS standard process.

Published in:

Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European

Date of Conference:

12-16 Sept. 2005