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A high dynamic range current-mode amplifier for computed tomography

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5 Author(s)

In this paper, we show a high dynamic range current-mode detector for computed 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. Nonlinearity is kept below 2% and signal bandwidth is higher than 10 kHz. A test structure with 4times4 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, IEEE Journal of  (Volume:41 ,  Issue: 7 )

Date of Publication:

July 2006

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