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This paper presents a novel front-end Application Specific Integrated Circuit (ASIC) dedicated to CZT detectors for positron-emission tomography (PET) imaging applications. The ASIC consists of a preamplifier using split-leg topology, a variable gain amplifier, a time-interleaved ramp ADC and a timing controller. The design techniques of these circuit blocks are discussed in detail. Meanwhile, the...
This paper presents a novel front-end electronic system dedicated to CZT detectors for positron-emission tomography (PET) imaging applications. It is implemented by full-customized readout application-specific integrated circuits with a post digital pulse shaping algorithm in FPGA. In the front-end readout ASIC, a preamplifier, a variable gain amplifier, a multiple-point sampling ramp ADC are integrated...
This paper presents a novel a front-end ASIC with post digital filtering and calibration dedicated to CZT detectors for PET imaging. A cascode amplifier based on split-leg topology is selected to realize the charge-sensitive amplifier (CSA) for the sake of low noise performances and the simple scheme of the power supplies. The output of the CSA is connected to a variable-gain amplifier to generate...
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