论文部分内容阅读
一、前言对霍尔元件来说,在几何形状不对称及材料不均一的情况下,就不存在与元件成垂直的磁束密度成分,这样,在输出端子处,就会出现所谓的残留电压。霍尔元件残留电压的补偿方法虽然有如图1所示的其他方法,但本文所介绍的方法,如图2所示,是在残留电压补偿回路中,如在最简单的图1的回路中输出端子间,接上一个包含二极管在内的负截回路,利用这种方法,对于残留电压大的霍尔元件来说,也能补偿使其输出特性具有非常良好的线性度。二、对输出电压进行线性补偿的措施方法首先,(1)在磁束密度B为零的情况下,调节R_v使输出电压V_H等于零。然后,(2)使具有额定磁束密度或使用最大磁束密度的磁场与
I. INTRODUCTION For Hall elements, the magnetic flux density component perpendicular to the element does not exist in the case of asymmetric geometry and inhomogeneous material so that a so-called residual voltage appears at the output terminal. Although there are other methods as shown in Fig. 1, the method of compensating for the residual voltage of the Hall element is as shown in Fig. 2, and in the residual voltage compensation circuit, as shown in the simplest circuit of Fig. 1 Terminals, connected to a negative section of the circuit, including the diode, with this method, the residual voltage of the Hall element can compensate for its output characteristics with very good linearity. Second, the output voltage linear compensation measures First of all, (1) magnetic flux density B is zero, the regulation R_v so that the output voltage V_H equal to zero. Then, (2) make a magnetic field with a nominal flux density or a maximum flux density