Overvoltage-proof circuit capable of preventing damage caused by overvoltage

An overvoltage-proof circuit capable of preventing damage caused by an overvoltage, the overvoltage-proof circuit comprising:

• a protected circuit generating at least one output signal(s) according to at least one input signal(s), the protected circuit receiving a power supply voltage for operation and including:
• a protected component configured to receive the at least one input signal(s);
• and
• at least one operational switch(es) configured to enable or disable the protected circuit according to an enablement signal;
• and
• a protecting circuit coupled between a first terminal of the protected circuit and a second terminal of the protected circuit, in which the first terminal is configured to receive the at least one input signal(s), the protecting circuit starts and/or stops operating before a transition of the enablement signal according to a switch signal so as to protect the protected component from the damage caused by the overvoltage which is greater than a withstanding voltage of the protected component.