基于改进型窗口比较器的多级输入状态检测与逻辑判断电路设计

Design of Multiple-Input Voltage Status Test and Logical Judgment Based on the Advanced Window Comparator

当以电压信号作为系统输入时,需检测输入电压的状态,从而做出判断,以便根据结果及时响应。当检测到输入电压异常即为欠压或过压时,系统需停止运行或自动实施保护。多电压等级输入时也是同样的道理,任何一路输入处于异常,都需要启动相应的保护措施。就多级输入逻辑判断而言,目前常用微控制器通过软件设计实现检测和处理功能,存在响应滞后、成本高等缺点。因此,根据常规多限窗口电压比较器电路,经过改进,采用直接的硬件电路,实现多输入电位逻辑判断的功能。最后,通过仿真和实验,验证了该设计方案的可行性。

The input status of a system is required to judge in order to respond or feedback by itself.As a input,the voltage has three possible statuses such as under-voltage,over-voltage and the normal one.Once the status of under-voltage or over-voltage is tested,the system should break running or protect itself.Multiple-input system operates on the same situation whichever is under-voltage or over-voltage.For multiple-input,the logical judgment is conducted by a Microcontroller,which has the response lag and high-cost.This paper proposes the design of multiple-input logical judgment based on the hardware,which is verified by simulation and experimental test.