READOUT CIRCUIT AND INTEGRATED CIRCUIT FOR X-RAY PIXEL DETECTOR

摘要

PROBLEM TO BE SOLVED: To provide an X-ray readout system which has a simpler structure, improves spatial non-linearity and eliminates spatial artifacts.;SOLUTION: The invention includes a plurality of channels including a plurality of analog front end circuits for reading analog X-ray exposure values from pixels of an X-ray pixel detector, respectively, and a plurality of successive approximation ADCs. Each of the plurality of analog front end circuits includes an output connected to the ADC and each ADC is configured so as to provide a digital value indicating the X-ray exposure value of one pixel. Each of ADCs has a feedback loop including the DAC, and a readout circuit includes a voltage reference unit for providing a plurality of reference voltages to the DACs of some of the plurality of ADCs.;COPYRIGHT: (C)2010,JPO&INPIT