ABSTRACT
Advanced very large system integration (VLSI) electronics and techniques of designing and prototyping integrated circuits (ICs) allow the integration of a large number of channels in a single chip, so that each element of the detector array can be readout by an individual electronic channel. The fast front-end electronics of a large array of x-ray sensors should amplify and filter small signals from the each sensor element, perform analog-to-digital conversion, and then store the data in digital form on the IC in each channel independently at the same time. Because of the complexity of the multichannel mixed-mode IC, the important problems like power limitation, low level of noise, good matching performance, and crosstalk effects must be solved simultaneously. This chapter discusses the architecture of the detector array and all the problems for the readout electronics in the digital x-ray imaging system.
