Abstract:A 144 channel measurement IC for CZT detectors, used for PET, is presented. Each channel consists of a charge sensitive amplifier, a fast and a slow signal shaper, a peak sampler for the energy acquisition and an event detector based on a time to digital converter to generate an accurate time stamp for each event. The channels are multiplexed to a fast pipeline ADC on demand. Measurement results for the ASIC showed a noise equivalent input charge of 800 e-rms and a time resolution of 737 ps rms. Evaluation res… Show more
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