Patent ID: 8051307

Claim:
A voltage-controlled device, used for receiving a voltage identification (VID) generated by a central processing unit (CPU) and determining the magnitude of a core voltage applied to the CPU based on a load line defined therein, the voltage-controlled device comprising: a load line register set, having a plurality of registers, values of the registers representing the defined load line; and a write logic, being electrically connected to the load line register set for changing the values of the registers in the load line register set according to a write signal, wherein initial values of the registers in the load line register set correspond to an original load line and the load current at the minimum voltage of the original load line is the maximum current thereof; the write logic changes the values of the registers in the load line register set to vary a slope of the original load line, thereby obtaining a flat load line with its slope flatter than that of the original load line; the write logic changes the values of the registers in the load line register set to vary deviation of the flat load line, thereby obtaining a power-saving load line; the varied deviation makes the intersection of the power-saving load line and the original load line at the maximum current.