Title :
A high dynamic range current-mode amplifier for computed tomography
Author :
Steadman, Roger ; Vogtmeier, Gereon ; Kemna, Armin ; Quossai, Salah Eddine Ibnou ; Hosticka, Bedrich J.
Author_Institution :
Philips Res. Lab., Aachen
fDate :
7/1/2006 12:00:00 AM
Abstract :
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
Keywords :
CMOS integrated circuits; computerised tomography; current mirrors; current-mode circuits; photodiodes; CMOS standard process; computed tomography; current mirror structure; current-mode amplifier; Bandwidth; Circuits; Computed tomography; Detectors; Dynamic range; Electrical capacitance tomography; Mirrors; Optical amplifiers; Photodiodes; X-ray imaging; CMOS; computed tomography; image sensor; monolithic integrated circuit; photodiodes; x-ray;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.873679
