一种减小电荷平衡式ADC非线性误差的方法研究

本文在提出电荷平衡式Ａ／Ｄ转换器通用等效模型的基础上，推导其相应传递函数，重点分析了非理想情况下定时及积分环节引起的非线性误差特点及其物理原因。然后从算法及测试方法方面提出了一种新颖的较全面地减小非线性误差的定面积积分对消的测量方法。实验结果表明，理论分析是正确的

An Approach to Minimize Nonlinearity of Charge-Balancing A/D Converter

Based on the generalized model and transformation function of the charge balancing A/D converters, this article demonstrates that non ideal properties of the timer and integrator are main factors, which result in the nonlinearity. An equation about the nonlinearity and critical non ideal factors is formulated with a rigorous and simple mathematical method. Then the paper presents novel methods to minimize the nonlinearity effectiveness. Experiments show that the techniques are successful.