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In this paper, we developed a 64-channel application specific integrated circuit (ASIC) named EXYT for $8 \times 8$ SSPM arrays for positron emission tomography (PET) and time-of-flight (TOF)-PET applications. It integrates individual fast readout for timing and resistive networks for energy and position measurements, which reduces the outputs down to 4 differential signals: Timing, Energy and X/Y...
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...
We have proposed a novel center-of-gravity (COG) time-over-threshold (TOT) method for PET detectors readout. In order to reduce the output channels it uses the charge division architecture and all the detector signals will be read out and multiplexed into 3 TOT outputs. The COG position can be decoded from the TOT information only without causing too much distortion. This method has very simple structure...
A cryogenic ultra-low noise CMOS CSA has been developed for point-contact HPGe detector for CDEX dark matter search experiment. Several design techniques have been adopted including adjustable biasing for low temperature operation, fast reset circuits without increasing parallel noise and an output stage with high capacitive drive capability. A prototype chip has been fabricated in 0.35µm CMOS technology...
This paper presents a Ballistocardiogram (BCG) measurement system to obtain BCG signal from a subject sitting on a chair installed three load-cell sensors platform. The measurement relies on sensing pressure variations on the seat related to cardiovascular cycles. Signals from sensors are amplified and filtered through a passband between 1 Hz and 40 Hz. An embedded-software runs on Micro2440 development...
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