基于容差分析的电路参数中心值设计研究

论述了电路参数设计的基本原理,提出了在PSpice 9软件上以容差分析为基础的电路参数中心值的设计方案.详细阐述了蒙特卡罗分析法、合格率的估算法及统计重心搜索法,对以蒙特卡罗分析为基础的电路合格率的统计及元件参数中心值的设计进行了研究.考虑到实际元件的容差分布对电路性能的影响,以OTL电路为例分析实现了电路性能指标满足约束条件下以合格率最大为目标的元件参数值的设计,证明了该方案的可行性.同时获得电路性能指标的统计特性及生产合格率的预测数据,对指导实际生产具有理论价值.

Research of Central Value Design of Circuit Parameter Based on Tolerance Analysis

Some basic theories about circuit parameter design are introduced ,the central value design of circuit parameter base on tolerance analysis in PSpice 9 software is put forward. Monte Carlo analysis method,approximation method of qualification rate and search method of statistical optimization are elaborated, the statistics of circuit qualification rate and the design of component parameter central value based on Monte Carlo analysis are researched. Considering the influence which the tolerance distribution affects on the circuit performance taking the OTL circuit for example we complete the design of component parameter value,with the target of maximization of the qualification rate the indications of circuit performance should satisfy the particular condition, it proves the feasibility of the project. We can get the predation rate of the production qualification rate and statistics characters of the performance indication of circuit. It has the theories value to guide actual the production.