A high dynamic range current-mode amplifier for computed tomography

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...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2006-07, Vol.41 (7), p.1615-1619
Main Authors: Steadman, R., Vogtmeier, G., Kemna, A., Quossai, S.E.I., Hosticka, B.J.
Format: Article
Language:English
Subjects:
Amplifiers
Applied sciences
Arrays
Bandwidth
Circuit properties
Circuits
CMOS
Computation
Computed tomography
Current mirrors
Design. Technologies. Operation analysis. Testing
Detectors
Dynamic range
Electric, optical and optoelectronic circuits
Electrical capacitance tomography
Electronic circuits
Electronics
Exact sciences and technology
image sensor
Integrated circuits
Mirrors
monolithic integrated circuit
Optical amplifiers
Optoelectronic devices
Photodiodes
Pixels
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Testing, measurement, noise and reliability
Tomography
x-ray
X-ray imaging
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Summary: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
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2006.873679