正确地提出和设计信息变换器的精度是系统设计人员和电路设计人员都关心的一个问题。本文介绍用简便的查表法确定变换器的设计精度。设计精度确定后,重要的问题在于变换器的原理误差和工具误差的分配。从而根据分配的原理误差设计变换器的位数;根据分配的工具误差设计变换器中的模拟电路(非数字电路)。本文归纳了这两种误差的分配方法及其相互约制关系。 Accurately proposing and designing the accuracy of the information converter is a matter of concern to both system designers and circuit designers. This article describes the use of a simple look-up table to determine the converter design accuracy. After the design accuracy is determined, the important problem lies in the principle error of the converter and the distribution of the tool error. Thus, the number of bits of the converter is designed according to the assigned principle error. The analog circuit (non-digital circuit) in the converter is designed according to the assigned tool error. This paper summarizes the distribution of these two kinds of errors and their mutual restraint relationship.