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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 design and preliminary performance of a mixed-signal front-end electronics dedicated to CZT detectors. It is implemented by a full-customized readout application-specific integrated circuit (ASIC) with a post digital pulse shaping algorithm in FPGA. In this scheme, the analog front-end consists of a preamplifier using split-let topology followed by a variable gain amplifier. A...
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