向前,刘洪庆,包思云.数字示波器直流增益准确度内置校准系统设计[J].电子测量技术,2016,39(4):23-26
数字示波器直流增益准确度内置校准系统设计
Design of built in DC gain accuracy calibration system for digital oscilloscope
  
DOI:
中文关键词:  数字示波器  校准  直流增益准确度  可编程差分放大器
英文关键词:digital oscilloscope  calibration  DC gain accuracy  programmable differential amplifier
基金项目:
作者单位
向前 中国电子科技集团公司第四十一研究所青岛266555 
刘洪庆 1. 中国电子科技集团公司第四十一研究所青岛266555; 2.电子信息测试技术安徽省重点实验室蚌埠233010 
包思云 中国电子科技集团公司第四十一研究所青岛266555 
AuthorInstitution
Xiang Qian The 41st Research Institute of CETC, Qingdao 266555, China 
Liu Hongqing 1. The 41st Research Institute of CETC, Qingdao 266555, China; 2. Key Laboratory of Electronic Measurement Technology, Bengbu 233010, China 
Bao Siyun The 41st Research Institute of CETC, Qingdao 266555, China 
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中文摘要:
      本文针对数字示波器直流增益准确度校准系统存在系统复杂、效率低的问题,设计了一种高效的内置校准系统。由示波器直接控制校准仪,省去了程控计算机,提高了控制流和数据流的速度;采用微小步距可编程差分放大器,提高了校准的精度;优化了校准算法,绕过了与校准无关的显示处理,直接计算校准参数;设计了高精度内部校准源,并与各种外部校准源的接口进行统一封装。实际测试应用表明,本内置校准系统在满足仪器指标要求的同时,能有效降低系统的复杂性,减小占地空间,缩短校准时间。
英文摘要:
      This paper proposes an efficient build in DC gain accuracy calibration system for digital oscilloscope, in order to substitute it for the conventional PC calibration system, which is complex and inefficient. Using Digital Oscilloscope instead of PC to control the oscilloscope calibrator directly, the system reduces the latency and speeds up its command stream and data stream. Benefiting from the tiny step programmable differential amplifier, the system improves the calibration accuracy. By calculating the calibration parameter according to sampling data directly, the system avoids the time consuming display processing. A high precision internal calibrator is designed and the interfaces of it and various external calibrators are unified. The actual application results show that the system can meet the measurement need, at the same time, reduces the complexity and shorten the calibration time.
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