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发明授权
CN105656017B 适用于集成电路的保护电路与输入电路 有权

适用于集成电路的保护电路与输入电路
摘要：
本发明公开了一种适用于集成电路的输入电路与其中的保护电路。上述保护电路包括晶体管、电压选择器、反相器、电阻、以及开关电路。晶体管耦接保护电路的输入端。电压选择器耦接晶体管与保护电路的该输入端，将保护电路的输入端的电压与接地电压其中较低者输出至晶体管。反相器耦接晶体管。电阻耦接于电源电压与反相器之间。开关电路耦接反相器、默认电压、以及保护电路的输出端，受反相器控制而连接默认电压与保护电路的输出端或使保护电路的输出端浮置。
摘要（英）：

The invention discloses an input circuit suitable for an integrated circuit, and a protection circuit therein. The protection circuit comprises a transistor, a voltage selector, an inverter, a resistor and a switch circuit. The transistor is coupled to the input end of the protection circuit. The voltage selector is coupled to the transistor and the input end of the protection circuit, for outputting lower voltages among voltages of the input end of the protection circuit and grounding voltages to the transistor. The inverter is coupled to the transistor. The resistor is coupled between source voltages and the inverter. The switch circuit is coupled to the inverter, default voltages and the output end of the protection circuit, and is connected with the default voltages and the output end of the protection circuit or enables the output end of the protection circuit to float under the control of the inverter.

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