<div style="text-align:justify;"> In view of the small transmission capacity and single signal modulation format of the existing optical transmission system, this paper proposes an ultra-high-speed opt...<div style="text-align:justify;"> In view of the small transmission capacity and single signal modulation format of the existing optical transmission system, this paper proposes an ultra-high-speed optical signal access scheme based on NEL0670, which can realize the transmission of 100 G DP-QPSK, 200 G DP-16QAM and 400 G DP-16QAM signals, and realize flexible and intelligent reception of multi-system optical signals. </div>展开更多
This fully digital beam position measurement instrument is designed for beam position monitoring and machine research in Shanghai Synchrotron Radiation Facility. The signals received from four position-sensitive detec...This fully digital beam position measurement instrument is designed for beam position monitoring and machine research in Shanghai Synchrotron Radiation Facility. The signals received from four position-sensitive detectors are narrow pulses with a repetition rate up to 499.654 MHz and a pulse width of around 100 ps, and their dynamic range could vary over more than 40 dB in machine research. By the employment of the under-sampling technique based on high-speed high-resolution A/D conversion, all the processing procedure is performed fully by the digital signal processing algorithms integrated in one single Field Programmable Gate Array. This system functions well in the laboratory and commissioning tests, demonstrating a position resolution (at the turn by turn rate of 694 kHz) better than 7 μm over the input amplitude range of -40 dBm to 10 dBm which is well beyond the requirement.展开更多
This paper presents main functions of a high voltage,high speed and extensive memory transient measurementequipment and design of associate hardware and software. Thepaper also introduces the hardware design of high s...This paper presents main functions of a high voltage,high speed and extensive memory transient measurementequipment and design of associate hardware and software. Thepaper also introduces the hardware design of high speed hugememory data sampler, explains the know-how of data analysissoftware, program-controlled voltage divider andanti-interference measurement, with which the equipmentperforms excellent on--site.This equipment reallies automatic measurement and satisfiesthe requirement of high voltage digital measurment.展开更多
在当前图像采集领域高分辨率、高帧率的要求下,移动产业处理器接口(Mobile Industry Processor Interface,MIPI)协议成为主流的高速图像数据传输协议。基于MIPI协议,采用IMX214图像传感器,通过自主设计图像数据采集板,满足4通道高速差...在当前图像采集领域高分辨率、高帧率的要求下,移动产业处理器接口(Mobile Industry Processor Interface,MIPI)协议成为主流的高速图像数据传输协议。基于MIPI协议,采用IMX214图像传感器,通过自主设计图像数据采集板,满足4通道高速差分信号传输,提出一种高速图像传感器数据采集电路的设计方案。使用现场可编程逻辑门阵列(Field Programmable Gate Array,FPGA)对图像传感器进行驱动控制与协议解析。测试结果表明,所设计的Verilog代码能够正确配置图像传感器的寄存器,并完成工作模式切换、字节串并转换、包头解析与格式转换等步骤,最终获得原始图像数据。展开更多
文摘<div style="text-align:justify;"> In view of the small transmission capacity and single signal modulation format of the existing optical transmission system, this paper proposes an ultra-high-speed optical signal access scheme based on NEL0670, which can realize the transmission of 100 G DP-QPSK, 200 G DP-16QAM and 400 G DP-16QAM signals, and realize flexible and intelligent reception of multi-system optical signals. </div>
基金Supported by Knowledge Innovation Program of The Chinese Academy of Sciences (KJCX2-YW-N27)the National Natural Science Foundation of China (10875119)100 Talents Program of The Chinese Academy of Sciences
文摘This fully digital beam position measurement instrument is designed for beam position monitoring and machine research in Shanghai Synchrotron Radiation Facility. The signals received from four position-sensitive detectors are narrow pulses with a repetition rate up to 499.654 MHz and a pulse width of around 100 ps, and their dynamic range could vary over more than 40 dB in machine research. By the employment of the under-sampling technique based on high-speed high-resolution A/D conversion, all the processing procedure is performed fully by the digital signal processing algorithms integrated in one single Field Programmable Gate Array. This system functions well in the laboratory and commissioning tests, demonstrating a position resolution (at the turn by turn rate of 694 kHz) better than 7 μm over the input amplitude range of -40 dBm to 10 dBm which is well beyond the requirement.
文摘This paper presents main functions of a high voltage,high speed and extensive memory transient measurementequipment and design of associate hardware and software. Thepaper also introduces the hardware design of high speed hugememory data sampler, explains the know-how of data analysissoftware, program-controlled voltage divider andanti-interference measurement, with which the equipmentperforms excellent on--site.This equipment reallies automatic measurement and satisfiesthe requirement of high voltage digital measurment.
