数字仪器的模拟变换部分包括了为特定目的而附加的部件,如数字电压表中为将被测电压规范化而加的量程转换部件;它也包括了不可避免地存在的设备不完善化的影响。数字部分的基本作用可表示为D_x~′=[A_x~′/a] (1)即将 A_x~′与 a 比较并整量化。所得结果 D_x~′经数字交换就得出最后的结果。式(1)中的方括号[ ]表示“取整量”的运算。由于它,数字仪表有所谓的“量化误差”。要提高数字仪器的读数容量,也必须注意整量化运算的特点。若 x 为实数,[x]表示取它的整量,所得 The analog conversion part of a digital instrument includes purpose-specific components, such as range conversion components in a digital voltmeter that normalize the voltage under test; it also includes the inevitable imperfections in the device. The basic role of the digital part can be expressed as D_x ~ '= [A_x ~' / a] (1) A_x ~ 'is compared with a and integer. The result D_x ~ 'obtained by the digital exchange of the final results. Square brackets [] in equation (1) indicate the “rounding” operation. Because of it, digital instrumentation has so-called “quantization error.” To improve the reading capacity of digital instruments, we must also pay attention to the characteristics of integer computing. If x is a real number, [x] represents the whole amount of the result