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readout electronics of a prototype time-of-flight ion composition analyzer for space plasma

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Nuclear Science and Techniques 2018年第4期29卷 98-107页

作者： Di Yang Zhe Cao Xin-Jun Hao Yi-Ren Li Shu-Bin Liu Chang-Qing Feng Qi An State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China Division of Space Physics University of Science and Technology of China Hefei 230026 China CAS Key Laboratory of Geospace Environment Hefei 230026 China

readout electronics is developed for a prototype time-of-flight(TOF) ion composition spectrometer for in situ measurement of the mass/charge distributions of major ion species from 200 to 100 ke V/e in space *** utilizing a constant fraction discriminator(CFD) and time-to-digital converter(TDC), challenging dynamic range measurements were performed with high time resolution and event rates. CFD was employed to discriminate the TOF signals from the micro-channel plate and channel electron multipliers. TDC based on the combination of counter and OR-gate delay chain was designed in a highreliability flash field programmable gate array. Owing to the non-uniformity of the delay chain, a correction algorithm based on integral nonlinearity compensation was implemented to reduce the time uncertainty. The test results showed that the electronics achieved a low timingerror of readout electronic.

关键词： Space plasma Ion composition analyzer readout electronics Constant fraction discriminator Time-to-digital converter

Study of readout and cross-talks for multi-strip RPC with PSpice simulation

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Chinese Physics C 2008年第10期32卷 825-830页

作者：王亚平贺小春蔡勖 Institute of Particle Physics Central China Normal University Department of Physics and Astronomy Georgia State University

An electrical model for multi-strip resistive plate chamber （RPC） is presented, and a comparison between simulation results and test data is carried on. Based on the model, the influences of the RPC＇s design parameters on the readout are studied with PSpice simulation. Cross-talk （CT） phenomenon is observed and the relative amplitudes of the CT are studied for different design parameters.

关键词： RPC PSpice readout CT

Noise and mismatch optimization for capacitive MEMS readout

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Journal of Semiconductors 2009年第11期30卷 88-93页

作者：张翀吴其松尹韬杨海钢 Institute of Electronics Chinese Academy of Sciences Graduate University of the Chinese Academy of Sciences

This paper presents a high precision CMOS readout circuit for a capacitive MEMS gyroscope. A continuous time topology is employed as well as the chopper noise cancelling technique. A detailed analysis of the noise and mismatch of the capacitive readout circuit is given. The analysis and measurement results have shown that thermal noise dominates in the proposed circuit, and several approaches should be used for both noise and mismatch optimization. The circuit chip operates under a single 5 V supply, and has a measured capacitance resolution of 0.2 aF/√Hz. With such a readout circuit, the gyroscope can accurately measure the angular rate with a sensitivity of 15.3 mV/°/s.

关键词： high precision readout capacitive MEMS

Online optimization for optical readout of a single electron spin in diamond

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Frontiers of physics 2023年第2期18卷 189-196页

作者： Xue Lin Jingwei Fan Runchuan Ye Mingti Zhou Yumeng Song Dawei Lu Nanyang Xu School of Microelectronics and School of Physics Hefei University of TechnologyHefei 230009China Research Center for Quantum Sensing Zhejiang LaboratoryHangzhou 311000China Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China

The nitrogen-vacancy(NV)center in diamond has been developed as a promising platform for quantum sensing,especially for magnetic field measurements in the nano-tesla range with a nano-meter *** spin readout performance has a direct effect on the signal-to-noise ratio(SNR)of *** this work,we introduce an online optimization method to customize the laser waveform for *** simulations and experiments reveal that our new scheme optimizes the optically detected magnetic resonance in NV *** SNR of optical spin readout has been witnessed a 44.1%increase in *** addition,we applied the scheme to the Rabi oscillation experiment,which shows an improvement of 46.0%in contrast and a reduction of 12.1%in mean deviation compared to traditional constant laser power SNR *** scheme is promising to improve sensitivities for a wide range of NV-based applications in the future.

关键词： NV center readout signal-to-noise ratio online optimization

Design of fast adaptive readout system for wire scanners

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Nuclear Science and Techniques 2018年第1期29卷 45-51页

作者： Qian-Shun She Yi Qian Jie Kong Hai-Bo Yang Hong-Yun Zhao Jing-Zhe Zhang Xiao-Yang Niu Jun-Xia Wu Hong Su Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China University of Chinese Academy of Sciences Beijing 100049China

A new wide-range fast readout system capable of adaptive identification is designed for wire scanners,which are used to measure beam profiles and *** system is capable of handling varying current signals with Gaussian distributions and current pulses up to 1000 counts/s, as well as an input current range of 1 n A–1 m A. When tested, the resolution was found to exceed 3.68% for full scale, the nonlinearity was found to be less than 0.11%, and the measurement sensibility was found to be less than 5 p A. We believe that the system will play a crucial role in improving the measurement accuracy of beam diagnosis and the efficiency of accelerator operation,as well as decreasing the time required for beam *** system was applied to the beam diagnosis of an injector II prototype for an accelerator-driven subcritical system and produced excellent measurement results. A description of the adaptive fast readout system for wire scanners is presented in this paper.

关键词： Wire scanner Weak current measurement Adaptive identification Front-end readout electronics Beam diagnosis

A Low-Noise readout Circuit for Gyroscopes

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Journal of Harbin Institute of Technology(New Series) 2015年第5期22卷 42-45页

作者： Guanshi Wang Xiaowei Liu Changchun Dong Micro-Electromechanical System Center Harbin Institute of Technology

In order to suppress the noise of gyroscopes,the method based on lock-in amplifier and capacitor matching of the low-noise readout circuit is proposed. Firstly,the principle to suppress the noise by lock-in amplifier is analyzed,and the noise model of front end is proposed. Secondly,the noise optimization for the charge amplifier is presented according to the noise model of front end. Finally,a readout circuit is constructed by this approach. The measurement results show that the parasitic capacitance of front end is 18 p F,and the noise at resonant frequency( 4 k Hz) is 133 n V / Hz1 / 2,and the overall bias stability is 30° /h,and the noise level is 0. 003° /( s·Hz1 / 2). The noise of the gyroscope with the low-noise readout by this method is suppressed effectively.

关键词： low-noise noise optimization charge amplifier gyroscope readout

Design of a Low-Noise Front-End readout Circuit for CdZnTe Detectors

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Journal of Signal and Information Processing 2013年第2期4卷 123-128页

作者： Bo Gan Tingcun Wei Wu Gao Huiming Zeng Yann Hu School of Computer Science and Technology Northwestern Polytechnical University Xi’an China

In this paper, the design of a novel low-noise front-end readout circuit for Cadmium zinc telluride (CdZnTe) X-ray and γ-ray detectors is described. The front-end readout circuits include the charge sensitive amplifier (CSA) and the CR-RC shaper is implemented in TSMC 0.35 μm mixed-signal CMOS technology. The die size of the prototype chip is 4.9 mm × 2.2 mm. The simulation results show that, the noise performance is 46 electrons + 10 electrons/pF, and power consumption is 1.65 mW per channel.

关键词： CdZnTe Detector Low Noise Front-End readout CMOS

Design of a Low-Noise Front-End readout CSP-Shaper System for CZT Detectors

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Journal of Signal and Information Processing 2013年第2期4卷 118-122页

作者： Huiming Zeng Tingcun Wei Bo Gan Wu Gao School of Computer Science and Technology Northwestern Polytechnical University Xi’an China

This paper describes a low-noise front-end readout circuit for CZT detectors based on TSMC 0.35 um mixed-single CMOS technology;mainly analyzes the noise model of the detector-preamplifier and presents the low-noise circuit schematic of charge sensitive preamplifier and shaper. Considering the parasitical influences, the circuit and layout-design are optimized to reduce noise. The preliminary simulation results show that, the equivalent noise charge (ENC) is 74 e﹣ (rms), noise slope is 9 e﹣/pF, power consumption is 2 mW, and non-linearity

关键词： CZTdetector Front-End readout CSP Low-Noise

Design of a Novel Front-End readout ASIC for PET Imaging System

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Journal of Signal and Information Processing 2013年第2期4卷 129-133页

作者： Huiming Zeng Tingcun Wei Linkai Shen Wu Gao School of Computer Science and Technology Northwestern Polytechnical University Xi’an China

The architecture of a multi-channel front-end system is important for realizing a high-resolution PET system. We propose a novel front-end readout electronic system with TDC to deal with time information for PET system which can easily design the timing control. Each channel consists of a charge preamplifier, slow/fast shaper, discriminator and an analog memory. There are an ADC and a TDC to process the energy information and time information for each channel at the same time. In this paper, the whole system signals flow is all simulated by MATLAB. The simulation results show that the proposed system can process slender current from the detector and achieve the energy and time information. The proposed architecture can be applied to high-resolution PET imaging systems with multi-channel ASICs.

关键词： PET Front-End readout Electronics TDC Positron Emission Tomography Imaging