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实用新型
CN203951456U 一种多档电子式自锁互锁开关电路 有权

一种多档电子式自锁互锁开关电路
摘要：
本实用新型涉及一种多档电子式自锁互锁开关电路。该电路包括12V直流电源、运算放大器A、运算放大器B、输出电平分压电路、直流电源分压电路组成，运算放大器A采用型号为LM324，运算放大器B采用型号为LM358，运算放大器A可组成四档自锁互锁开关电路，运算放大器B可组成二档自锁互锁开关电路，每档自锁互锁开关电路结构相同，A和B可组成六档自锁互锁电路。本实用新型克服了机械式自锁互锁开关存在的缺陷。使每组运算放大器均有着电压比较器和施密特触发器的双重功能。由于运算放大器输入阻抗较高，按键开关的输入电流极小，开关的输入与输出电平符合数字电路接口电平的要求，可与数字电路同用一组工作电源。
摘要（英）：

The utility model relates to a multi-gear electronic type self-locking interlocking switch circuit. The circuit comprises a 12 V direct-current power supply, an operational amplifier A, an operational amplifier B, an output level bleeder circuit and a direct-current power supply bleeder circuit, wherein the model of the operational amplifier A is LM 324 while the model of the operational amplifier is LM 358, the operational amplifier A may constitute four gears of self-locking interlocking switch circuits while the operational amplifier B may constitute two gears of self-locking interlocking switch circuits, all gears of self-locking interlocking switch circuits are the same in structure, and A and B can constitute six gears of self-locking interlocking circuits. Defects of conventional mechanical-type self-locking interlocking switches are overcome. Each group of operational amplifiers has dual functions of both a voltage comparator and a schmitt trigger. Because the input resistance of the operational amplifiers is high and the input current of key switches is very small, input and output levels of the switch meet requirements for a digital circuit interface level and the switch circuit can share the same group of working power source with the digital circuit.

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