扩展器在某一给定范围的输入电压内产生较大输出电压的转换器

A transducer designed for a given range of input voltages that produces a larger range of output voltages.

就模拟输入而言，使模数转换器不能区别其变化的超范围的绝对电压值。超载值对于正输入和负输入可能不同。

For analog inputs, any absolute voltage value above which the analog-to- digital converter cannot distinguish a change. The overload value can be different for plus and minus inputs.