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An In-Pixel Current-Mode Amplifier for Computed Tomography

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5 Author(s)

A high-dynamic-range current-mode detector for a computed-tomography application is shown. A regulated current-mirror structure that provides a 17-bit dynamic range and a noise floor below 3 pArms has been implemented at pixel level. Nonlinearity is kept below 2%, and the signal bandwidth is higher than 10 kHz. A test structure with a 4 times 4 pixel array is presented in this paper. Both the photodiode and the current-mode amplifier have been integrated into the same CMOS standard process

Published in:

Sensors Journal, IEEE  (Volume:6 ,  Issue: 6 )