Patent ID: 7928933

Claim:
A semiconductor device comprising: a load; a first constant current source; a second constant current source; a first transistor; a second transistor; a first switch electrically connected between the load and the first transistor; a second switch electrically connected between the first constant current source and the first transistor; a third switch electrically connected between the second constant current source and the first transistor; a fourth switch electrically connected between a gate electrode of the first transistor and a drain region of the first transistor; a fifth switch electrically connected between the gate electrode of the first transistor and a gate electrode of the second transistor; and a sixth switch, electrically connected between the gate electrode of the second transistor and a third power source, wherein the load, the first transistor and the second transistor are electrically connected in series between a first power source and a second power source, wherein the load, the first constant current source and the second constant current source are electrically connected in parallel between the first power source and the first transistor, wherein the gate electrode of the first transistor is electrically connected to the second power source.