A 32-channel CMOS charge readout ASIC,which amplifies the weak signal generated by the X-ray detector array,is designed.Each channel contains a charge sensitive amplifier,a correlated double sampler,and a sample-and-hold circuit.Noise characteristic of the readout circuit,especially the CSA,is theoretically analyzed,based on which optimization of schematic is achieved.Simulation results show that the integrated output noise is 69.7 μV.
【更新日期】
2014-08-29
【分类号】
TL816.1
【正文快照】
X-ray detectors have been widely used in manyaspects.In subway,airport or seaport,X-ray imagingis applied to inspect luggage to exclude weapons,explosives and other illegal items[1].In other fields,such as medical,agriculture,industry,X-ray detectorsalso
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