基于自校法原理的DAC线性误差快速测试仪  

A Fast Instrument Based on Self-calibration Method for Testing Linear Error of DAC

作　　者：陶时澍[1] 徐石明[1] 富致超 

机构地区：[1]哈尔滨工业大学,哈尔滨电工仪表研究所

出　　处：《计量学报》1994年第4期305-313,共9页Acta Metrologica Sinica

摘　　要：本文讨论了自校法测试数－模转换器（ＤＡＣ）线性误差的两个难点：数学模型的建立和原始数据的测试。对测试仪作了误差分析，导出了估计测量误差的表达式，给出了对比实验结果。自校法测试ＤＡＣ无需对放大器的失调及增益做事先调整，也无需高准确度的标准源及数字电压表，适合于自动测试。Both the difficult points, building the mathematical model and acquiring the measurement data, for testing linear error of DAC based on self-calibration method are discussed in this paper. The block diagram of major software is given. The error analysis is made, the expression for estimating measurement accuracy is derived,and the results of a comparison experiment are given. Without adjusting the gain and zero error of the amplifier previously and requiring the high accuracy standard voltage sources and digital voltmeters, therefore, the method is suitable for automatic test.

关 键 词：数-模转换器 自校法 位误差 越位误差 线性误差 自动测试 

分 类 号：TP335.4[自动化与计算机技术—计算机系统结构]