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Gate leakage of charge sensitive amplifier (CSA) in deep submicron process not only increases noise but also impacts the DC voltage of preamplifier output. This paper proposes a CSA for CdZnTe particle detector readout implemented in 0.18μm CMOS process including its new reset and leakage compensation configuration which has low noise and short reset time, especially, is adjustable to fit...
The paper presents a readout circuit associated with photodiodes dedicated to an in-vivo dosimeter. The circuit consists of a fully differential charge sensitive amplifier (CSA) stage, a differential-to-single-ended amplifier stage and a buffered double sampling stage. The CSA implements a switched integration method to minimize dark current contribution to integrated output signal. Its fully differential...
This paper presents the design of a low-noise multi-channel front-end readout chip integrated with a high-resolution TDC. It is foreseen to be used as front-end readout electronics of Avalanche Photo Diodes (APD) dedicated to a small animal Positron Emission Tomography (PET) system. The architecture of the chip is depicted. Two prototype chips, a ten-channel front-end chip and a three-channel high-resolution...
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