Continuous-time delta-sigma based readout concepts for CZT detector arrays

A new direct analog to digital conversion strategy for the readout of radiation detector arrays is presented in this paper. The traditional signal processing channel as used for radiation detector arrays is compared to the proposed solution. The main building blocks of the new concept are identified and presented in detail. A digitally stabilized front-end amplifier and two continuous-time oversampling analog to digital converter are presented. The new concept is compared to analog implementations with similar performance. The advantages of the new concept in terms of area and power consumptions reduction are illustrated.