检索结果-南通市图书馆

A high precision time-to-digital converter based on multi-phase clock implemented within Field-Programmable-Gate-Array

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2010年第2期21卷 123-128页

作者： CHEN Kai liu shubin AN Qi Key Laboratory of Technologies of Particle Detection ＆ Electronics Chinese Academy of Sciences Department of Modern Physics University of Seience and Technology of China Hefei 230026 China Anhui Key Laboratory of Physics Electronics Department of Modern Physics University of Science and Technology of China Hefei 230026 China

In this paper, the design of a coarse-fine interpolation Time-to-Digital Converter (TDC) is implemented in an ALTERA’s Cyclone FPGA. The carry-select chain performs as the tapped delay line. The Logic Array Block (LAB) having a propagation delay of 165 ps in the chain is synthesized as delay cell. Coarse counters triggered by the global clock count the more significant bits of the time data. This clock is also fed through the delay line, and LABs create the copies. The replicas are latched by the tested event signal, and the less significant bits are encoded from the latched binary bits. Single-shot resolution of the TDC can be 60 ps. The worst Differential Nonlinearity (DNL) is about 0.2 Least Significant Bit (LSB, 165 ps in this TDC module), and the Integral Nonlinearity (INL) is 0.6 LSB. In comparison with other architectures using the synchronous global clock to sample the taps, this architecture consumed less electric power and logic cells, and is more stable.

关键词：现场可编程门阵列时间数字转换器位时钟高精度抽头延迟线多相基础微分非线性

A 2nd-Order Noise Shaping SAR ADC Realizing NTF Zero-Pole Optimization Based on IIR-FIR Filter

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2022年第1期31卷 33-39页

作者： ZHANG Yanbo liu shubin LIANG Yuhua ZHU Zhangming School of Microelectronics Xidian University

This paper reports a successive approximation register(SAR) analog-to-digital converters(ADCs) with the 2 nd-order and optimized noise shaping(NS) scheme. Based on the feed-forward structure, both noise transfer function(NTF) zero and pole optimization have been achieved simultaneously utilizing a cascaded IIR-FIR(infinite impulse response and finite impulse response) filter. The analysis shows that the proposed structure provides a better NS efficiency than prior arts. The efficiency of the proposed NS scheme and the ADC performance are verified by simulation achieving a 14.2 effective number of bits with an 8-bit SAR ADC architecture at an over sampling rate of 8 sampled at 100 MS/*** advantage of the NTF zero-pole optimization, a low resolution SAR ADC is allowed under the same quantization noise budget in this structure.

关键词： feedforward structure 2nd-order noise shaping SAR ADC architecture noise transfer function zero quantization noise budget transfer functions NTF zero-pole optimization analog-to-digital converters finite impulse response infinite impulse response cascaded IIR-FIR filter FIR filters analogue-digital conversion IIR filters optimisation NS scheme

An USB-based time measurement system

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2010年第6期21卷 366-369页

作者： Qin Xi liu shubin An Qi Chinese Acad Sci Key Lab Technol Particle Detect & Elect Hefei 230026 Peoples R China Univ Sci & Technol China Dept Modern Phys Anhui Key Lab Phys Elect Hefei 230026 Peoples R China

In this paper,we report the electronics of a timing measurement system of PTB(portable TDC board), which is a handy tool based on USB interface,customized for high precision time measurements without any crates. The time digitization is based on the High Performance TDC Chip(HPTDC).The real-time compensation for HPTDC outputs and the USB master logic are implemented in an ALTERA's Cyclone *** architecture design and logic design are described in *** of the system showed a time resolution of 13.3 ps.

关键词： USB接口时间测量测量系统 ALTERA公司 Cyclone HPTDC 体系结构设计逻辑设计

A digitalizing board for the prototype array of LHAASO WCDA

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2011年第3期22卷 178-184页

作者： HAO Xinjun liu shubin ZHAO Lei AN Qi State Key Laboratory of Particle Detection & Electronics Hefei 230026 China anhui Key Laboratory of Physical Electronics Department of Modern Physics University of Science and technology of China HeJbi 230026 China

In this paper,a digitalizing board for readout of PMT signals in the prototype array of WCDA(water Cerenkov detector array)for LHAASO(Large high altitude air shower observatory)is *** prototype array is composed of 9 PMTs,including the pulse time and charge measurement from the PMTs,and clock generation and trigger *** the digitalizing board,FPGA reconfiguration and data readout via VME bus are *** results show that the performances meet well with the requirements of readout *** has been installed in Yangbajing and tests with the prototype array and DAQ is ongoing.

关键词：探测器阵列数字化板原型光电倍增管数据读出 VME总线时钟产生电荷测量

A 1.8-V 240-MHz 2.19-mW Four-Stage CMOS OTA with a Segmenting Frequency Compensation Technique

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2021年第5期30卷 853-860页

作者： LIANG Yuhua ZHENG Zirui liu shubin LI Dengquan DING Ruixue ZHU Zhangming School of Microelectronics Xidian University

A four-stage Operational transconductance amplifier(OTA) used in an infrared temperature sensor adopting the proposed Feed-forward Gm-stage and segmenting nested Miller compensation technique is presented. The purpose of the proposed segment compensation is primarily to make more amplifier stages concatenated. The circuit linked several transconductance stages to form a segment, and linked several segments to form a large multistage amplifier. For example, a twostage amplifier linked with a three-stage amplifier can realize a five-stage amplifier, two three-stage amplifiers linked can realize a six-stage amplifier. A four-stage amplifier in the form of 2+2(two stages and two stages)was used as an example to verify this compensation method. The proposed OTA is designed in the 180 nm complementary metal oxide semiconductor process. It consists of two parts which ensure the stability and improve the bandwidth performance. The first part is a feedforward transconductance stage, and the second part is the two-segment transconductance stages with the Miller compensation techniques employed within and between the two segments. Based on the small-signal model,stability analysis and theoretical derivation are performed in theory. On condition of a 2-pF load capacitance, a direct current gain of 109 dB and a gain-bandwidth of 240 MHz with a phase margin of 50° can be achieved. The proposed design consumes 2.19 mW in a 1.8-V supply voltage. The transient simulation indicates that the settling time of the output is 19 ns with the settling error being 1%, and the slew rate is 114 V/μs.

关键词： six-stage amplifier power 2.19 mW time 19.0 ns transient simulation four-stage Operational transconductance amplifier theoretical derivation compensation large multistage amplifier four-stage amplifier operational amplifiers five-stage amplifier small-signal model three-stage amplifier segmenting frequency compensation technique phase margin bandwidth performance complementary metal oxide semiconductor process CMOS analogue integrated circuits gain 109.0 dB feedforward amplifiers stability analysis two-stage amplifier capacitance 2 pF multistage amplifier two-segment transconductance stages integrated circuit design voltage 1.8 V four-stage CMOS OTA segmenting nested Miller compensation technique circuit stability bandwidth 240.0 MHz size 180.0 nm feedforward transconductance stage

A Prototype of beam position and phase measurement electronics for the LINAC in ADS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2013年第6期24卷 87-93页

作者： HU Xiaofang ZHAO Lei GAO Xingshun liu shubin AN Qi State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China

This article presents a prototype of beam position and phase measurement(BPPM)electronics designed for the LINAC in China Accelerator Driven Sub-critical system(ADS).The signals received from the Beam Position Monitor(BPM)detectors are narrow pulses with a repetition frequency of 162.5 MHz and a dynamic range more than40 *** on the high-speed high-resolution Analog-to-Digital conversion technique,the input RF signals are directly converted to In-phase and Quadrature-phase(IQ)streams through under-sampling,which simplifies both the analog and digital processing *** signal processing is integrated in one single FPGA,in which real-time beam position,phase and current can be obtained.A series of simulations and tests have been conducted to evaluate the *** test results indicate that this prototype achieves a phase resolution better than 0.1 degree and a position resolution better than 20μm over a 40 dB dynamic range with the bandwidth of 780 kHz,which is well beyond the application requirements.

关键词：电子直线加速器位置检测器相位测量 ADS 光束原型数字转换技术数字处理电路

Clock distribution system for large high altitude air shower observatory

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2011年第6期22卷 353-357页

作者： CAO Zhe liu shubin LI Cheng AN Qi State Key Laboratory of Particle Detection ＆ Electronics Anhui Key Laboratory of Physical Electronics Department of Modern Physics University of Science and Technology of China Hefei 230026 China

In this paper,we report a clock distribution system for Water Cherenkov Detector Arrays(WCDAs) in Large High Altitude Air Shower Observatory(LHAASO) *** designed electronics system is of high performance in implementing the clock distribution among detectors of a large scale of *** on Serializer/Deserializer(SerDes) and fiber transmission,the clock distribution system is the modules of central back end to distributed front *** clock distribution system has been evaluated with a two modules *** all the four SerDes candidates for clock transmission with jitters below 17 ps,the DS92LV16 has a fixed phase relationship between transmission clock and recovered clock,hence its use in LHAASO WCDAs.

关键词：分配系统天文台高海拔时钟淋浴空气探测器阵列光纤传输

An Improved Model to Characterize Drill-String Vibrations in Rotary Drilling Applications

在线全文

学校读者我要写书评

暂无评论

Fluid Dynamics & Materials Processing 2022年第5期18卷 1263-1273页

作者： Yong Wang Hongjian Ni Ruihe Wang shubin liu School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China

A specific model is elaborated for stick-slip and bit-bounce vibrations,which are dangerous dynamic phenomena typically encountered in the context of rotary drilling *** a model takes into account two coupled degrees of freedom of drill-string ***,it assumes a state-dependent time delay and a viscous damping for both the axial and torsional vibrations and relies on a sawtooth function to account for the cutting force *** the frame of this theoretical approach,the influence of rock brittleness on the stability of the drill string is calculated via direct integration of the model *** results show that the rock brittleness has a great influence on the rotational speed and bit depth.

关键词： Stick-slip vibration bit bouncing torsion pendulum rock brittleness cutting force

A new TOF system for target recoil-ion momentum spectroscopy at IMP

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2011年第6期22卷 372-378页

作者： ZHOU Jiawen liu shubin YIN Chunyan AN Qi ZHAO Lei State Key Laboratory of Particle Detection ＆ Electronics Hefei 230026 China Anhui Key Laboratory of Physical Electronics Department of Modern Physics University of Science and technology of China Hefei 230026 China

A high resolution time measurement system with high data transfer rate was designed for the COLTRIMS (Cold Target Recoil-Ion Momentum Spectroscopy) system in Institute of Modern Physics,Chinese Academy of *** is used to measure the Time of Flight(TOF) with a high resolution for all 20 *** on the PCI Extensions for Instrumentation(PXI) standard,the readout electronics system consists of one Clock-Trigger fan-out module and four TOF *** results show that the system meets the demands of COLTRIMS,with a time resolution of better than 25 ps and a data transfer rate over 20 MB/s.

关键词：反冲离子 F系统动量谱进出口近代物理研究所中国科学院飞行时间数据传输速率