Patent ID: 8502611

Claim:
A semiconductor device comprising: a control portion including a first transistor, a second transistor and a third transistor; a current source portion electrically connected to the control portion; and a monitoring circuit including a first p-channel transistor, a second p-channel transistor, a first n-channel transistor and a second n-channel transistor, wherein a drain of the first transistor and a drain of the third transistor are electrically connected to each other, wherein a drain of the second transistor and the drain of the third transistor are electrically connected to each other, wherein the third transistor is diode-connected, wherein a power supply voltage is supplied to a source of the third transistor, a source of the first p-channel transistor and a source of the second p-channel transistor, wherein the drain of the first transistor is configured to output a first voltage to the current source portion, wherein a second voltage is input to a gate of the second transistor, wherein each of the first p-channel transistor, the second p-channel transistor and the first n-channel transistor is diode-connected, wherein a drain of the first p-channel transistor, a drain of the first n-channel transistor and a gate of the second n-channel transistor are electrically connected to each other, and wherein a drain of the second p-channel transistor and a drain of the second n-channel transistor are electrically connected to each other and configured to output the second voltage to the gate of the second transistor.