论文部分内容阅读
1.前言为了精确地测量电阻,可采用多种类型的电桥。其中手动复零电桥使用不太方便,另一种可测量电阻上的误差电压的电桥,但它不是被测电阻的线性函数。本文介绍的电路,将提供一个与被测电阻R_X 及标准电阻 R_a 的差值成比例的电压。如图1所示,接入 R_X 作为具有恒定输入电压的放大器的反馈电阻,从而在 R_X 上取得线性电压。此处
1. Introduction In order to accurately measure the resistance, you can use a variety of types of bridge. Manual zero-crossing bridge which is not easy to use, another measure of resistance error voltage on the bridge, but it is not a linear function of the measured resistance. The circuit described in this article will provide a voltage that is proportional to the difference between the resistor R_X under test and the standard resistor R_a. As shown in FIG. 1, R_X is connected as a feedback resistor of an amplifier with a constant input voltage to take a linear voltage on R_X. Here