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• W4206015587 abstract "This paper presents a readout integrated circuit of pixel architecture called MPIX (Multithreshold PIXels), designed for CdTe pixel detectors used in high-energy X-ray imaging applications. The MPIX IC of the area of <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$9.6 text{mm} times 20.3 text{mm}$</tex> is designed in a CMOS 130 nm process. The IC core is a matrix of <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$96times 192$</tex> square-shaped pixels of <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$100 mu mathrm{m}$</tex> pitch. Each pixel contains an analog front-end, four independently working discriminators, and four 12-bit ripple counters. Such pixel architecture allows photon processing one by one and selecting the X-ray photons according to their energy (X-ray color imaging). The MPIX chips are bump-bonded to pixel CdTe sensor with a pitch of <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$100 mu mathrm{m}$</tex> and thickness of <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$750 mu mathrm{m}$</tex> . These hybrid detectors (sensor bump-bonded to readout integrated circuit) are characterized by test pulses and X-ray radiation. To match the different range of applications the MPIX chip has 8 possible different gain settings. In the high gain mode, the chip can operate with Xray photons up to 46 keV and has the Equivalent Noise Charge (ENC) of 123 el. rms. In the low gain mode, the ENC is equal to 192 el. rms, and the chip can process the X-ray photons of energy up to 154 keV. The matrix of 18432 pixels has a very good uniformity: globally set threshold has an effective pixel to pixel offset spread of 1 mV (for the full threshold range up to 800 mV). The power consumption per pixel is <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$80 mu mathrm{W}/text{pixel}$</tex> . Additionally, to deal with charge sharing effects in a thick semiconductor pixel sensor, Multithreshold Pattern Recognition algorithms are implemented in the MPIX IC." @default.
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• W4206015587 date "2021-11-28" @default.
• W4206015587 modified "2023-10-18" @default.
• W4206015587 title "Hybrid Detector with Interpixel Communication for Color X-ray Imaging" @default.
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• W4206015587 doi "https://doi.org/10.1109/icecs53924.2021.9665489" @default.
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