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在数字仪表及电工仪表中,常用精密线绕电阻构成所需要的衰减量,因此衰减网络的精度就直接影响到整个仪器或仪表的精度。衰减网络本身是在假定源内阻为零和负载电阻为无穷大的情况下设计的。但在实际应用中并不如此。这样在测量时,就不可避免地引起衰减误差。对这些误差进行定量分析和求出最佳衰减网络的计算公式,包括推导出衰减网络最大相对误差的位置和最大相对误差的计算公式,推导出最佳衰减网络的计算公式和在此条件下的衰减网络最大相对误差最小值的计算公式。
In digital instrumentation and electrical instrumentation, commonly used precision wirewound resistors constitute the required attenuation, so attenuation of the network accuracy directly affects the accuracy of the entire instrument or instrument. The attenuation network itself is designed assuming zero source resistance and infinite load resistance. But in actual application is not the case. This measurement will inevitably lead to attenuation error. The quantitative analysis of these errors and the calculation of the optimal attenuation network, including the derivation of the maximum relative error attenuation network location and the maximum relative error of the formula to derive the optimal attenuation network calculation formula and in this condition The calculation formula of the minimum relative error of attenuation network.