Patent ID: 8471623

Claim:
An integrated circuit, comprising a programming power supply control circuit, a voltage adjustable power supply circuit, an electronic fuse circuit and a power source switch circuit, wherein: the programming power supply control circuit outputs a first power supply control signal to the voltage adjustable power supply circuit and the power source switch circuit and outputs a first programming control signal to the electronic fuse circuit; or outputs a second power supply control signal to the voltage adjustable power supply circuit and the power source switch circuit and outputs a second programming control signal to the electronic fuse circuit; the power source switch circuit receives the first power supply control signal and switches on a connection of the voltage adjustable power supply circuit with the electronic fuse circuit; or receives the second power supply control signal and switches off the connection of the voltage adjustable power supply circuit with the electronic fuse circuit; the voltage adjustable power supply circuit receives the first power supply control signal and outputs a first voltage signal to the electronic fuse circuit through the power source switch circuit and to other functional circuits of the integrated circuit; or receives the second power supply control signal and outputs a second voltage signal to the other functional circuits of the integrated circuit; and the electronic fuse circuit receives the first programming control signal and the first voltage signal and blows corresponding one of electronic fuses in the electronic fuse circuit; or receives the second programming control signal and ensures the corresponding one of the electronic fuses in the electronic fuse circuit not to be blown.