Patent ID: 7638903

Claim:
An integrated circuit comprising a plurality of circuits, the integrated circuit comprising: control circuitry for providing first control information and for providing second control information; a first power circuit for receiving the first control information and for providing a first voltage, wherein the first voltage is determined by the first control information, and wherein the first power circuit comprises a first charge pump and a first regulator coupled via a first feedback path from the first regulator to the first charge pump; a second power circuit for receiving the first control information and for providing a second voltage, wherein the second voltage is determined by the first control information, and wherein the second power circuit comprises a second charge pump and a second regulator coupled via a second feedback path from the second regulator to the second charge pump; and switching circuitry coupled to the plurality of circuits, to the first power circuit, and to the second power circuit, said switching circuitry receiving the second control information, wherein the first power circuit is couplable via the switching circuitry to a first one of the plurality of circuits in response to the second control information received by the switching circuitry, and wherein the second power circuit is couplable via the switching circuitry to said first one of the plurality of circuits in response to the second control information received by the switching circuitry.