کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1830848 1027486 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design and test of an integrated Sigma–Delta analog-to-digital converter for X-ray Computed Tomography
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Design and test of an integrated Sigma–Delta analog-to-digital converter for X-ray Computed Tomography
چکیده انگلیسی

Aiming at a compact, cost-effective data readout for X-ray CT, a monolithic approach is presented where photosensor and parts of the analog-to-digital converter are located on the same substrate. In a special realization of the ‘digital pixel’, a test array of photodiodes and in-pixel Sigma–Delta modulators has been developed and produced in a standard 0.8μm CMOS process. The single-bit, discrete-time modulator is of third order and has feedforward topology. Test samples have been characterized with emphasis on noise performance and linearity. An off-chip, decimation and low-pass filter has been designed according to the special requirements of CT. Signal processing with oversampling ADCs is compared to conventional solutions for data readout in X-ray CT.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 576, Issue 1, 11 June 2007, Pages 123–127
نویسندگان
, , , , , ,