光电隔离组件(Isolator,或者称作光电耦合组件Photocoupler)是由发光二极管和光敏元件组成的集成器件。信号是通过光来传递的,因此,输入与输出之间在电气上是隔离的(绝缘的)。光电隔离组件的这个特征可加以有效地利用,最近在计算机的输入,输出装置等数字电路中大量地使用这种组件。另外,模拟电路中还没有怎么使用光电隔离组件,这是由于输入、输出之间的线性不好的缘故。为了解决这个问题,本文介绍几种电路,若采用这些电路,可把线性误差抑制在1～2%之内。 Isolator (also known as photocoupler photocoupler) is composed of light-emitting diodes and photosensitive elements integrated device. The signal is transmitted by light, so the input and output are electrically isolated (isolated). This feature of the optoelectronic isolation module can be effectively utilized and has recently been used extensively in digital circuits such as computer input and output devices. In addition, the analog circuit has not yet how to use optical isolation components, which is due to the linearity between the input and output reasons. In order to solve this problem, this article describes several circuits, using these circuits, the linear error can be suppressed within 1 to 2%.