本文提出并分析了能保护CMOS电路不受外围连接错误(如电源电压的反向等)影响的几种电路结构。找到了能够保护输入连接、输出连接以及电源电压连接的任何转换,使其不敢损坏电路的方法。设计目的是不管芯片的外围电路怎样连接,都能防止其发生永久性的损坏。通过分析和实验,发现这一目标是可以实现的。 This paper presents and analyzes several circuit architectures that can protect CMOS circuits from peripheral connection errors such as the reverse of supply voltage. Found to be able to protect the input connection, the output connection and the power supply voltage conversion, so that it can not damage the circuit method. The purpose of the design is to prevent permanent damage to the chip regardless of how the peripheral circuits are connected. Through analysis and experiment, we found that this goal can be achieved.