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The paper presents the development of a multi-energy photon-counting readout ASIC for CZT detectors for spectral X-ray imaging applications. It integrated 32 identical channels of signal processing circuits, including a charge sensitive preamplifier, a high-order CR-(RC)6 shaper with 100 ns peaking time and five discriminators with fine threshold adjustment and corresponding window logics and 16-bit...
An eight-channel readout ASIC has been developed for reading out signals from Silicon Photomultiplier (SiPM) for PET applications. It converts both signal charge and occurring time to digital timing pulses and only needs TDC. It has the advantages of simplified circuit design, reduced power consumption and suitable for large number of readout channels. The ASIC uses a fully current mode preamplifier...
A readout ASIC has been designed for gas detectors with self-amplification such as GEM and RPC. It provides amplification and CR-(RC)4 shaping of the detector signals and buffers them to the free running ADCs at ∼10MSPS. The charge gain can be adjusted from 1mV/fC to 28mV/fC and the shaping time can be adjusted from 25ns to 100ns. The programmability of the gain in such wide range and the shaping...
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