Gnade, Michael:
Digitale CMOS-Photodetektormatrizen mit integrierten A-D-Wandlern
2004
2004Dissertation
Elektrotechnik
Titel:
Digitale CMOS-Photodetektormatrizen mit integrierten A-D-Wandlern
Autor*in:
Gnade, Michael
Erscheinungsjahr:
2004
Umfang:
XIV, 208 S.
DuEPublico 1 ID
Signatur der UB:
Notiz:
Duisburg, Essen, Univ., Diss., 2004

Abstract:

In the field of radiological diagnostics, especially for the computed tomography a large number of photodetector elements (so called Pixels) is needed to assemble a large-area X-Ray-sensitive detector. These pixels should provide very high sensitivity, a very large dynamic range and a high signal-to-noise-ratio. Moreover, an in-pixel digitization of the signals is desired. To meet these specifications, a digital CMOS-Pixel comprising a special type of photodiode and a single-loop sigma-delta-modulator was developed, theoretically analyzed, fabricated and characterized. A matrix of 4x4 digital CMOS-pixels with each of them consuming an area of 1mm² has been fabricated. For further signal processing the concept of a multichannel decimation filter is presented.