本文在综合分析目前经常使用的一些遮蔽电路的基础上,介绍了一种新型自动遮蔽电路。这种电路的特点是遮蔽时间可任意选定,即在不同频率信号下,遮蔽时间可自动改变,这样自动化程度高,而且实现方便,电路简单。当计算机参与工作时,可进行程序控制。此电路适用于自动化程度较高的高精度设备上。 Based on a comprehensive analysis of some commonly used masking circuits, this paper introduces a new type of automatic masking circuit. The characteristics of this circuit is the shadowing time can be arbitrarily selected, that is, under different frequency signals, shadowing time can be automatically changed, so that a high degree of automation, and easy to implement, the circuit is simple. When the computer involved in the work, the program can be controlled. This circuit is suitable for a high degree of automation of high precision equipment.