Patent ID: 7477499

Claim:
A switching device comprising: a first switching element, a second switching element and a third switching element, each of the switching elements comprising a control terminal, a first power terminal, a second power terminal, a gate and a back gate, wherein the first power terminal of the second switching element is connected with the first power terminal of the first switching element, and the second power terminal of the second switching element is connected with the back gates of the first and second switching elements, the first power terminal of third switching element is connected with the second power terminal of the first switching element, and the second power terminal of the third switching element is connected with the back gates of the first and third switching elements, and the gate of the second switching element is connected with neither of the first and second power terminals nor the back gate of the first switching element, and the gate of the third switching element is connected with neither of the first and second power terminals nor the back gate of the first switching element.