| 摘要 |
A substrate potential detection circuit includes a substrate potential detection unit including a first transistor having a gate and a source connected respectively to a ground line and a reference voltage line, a second transistor having a gate receiving a substrate potential and a drain connected to the ground, and a third transistor having a source connected to the drain of the first transistor and a gate and a drain connected in common to the source of the second transistor to form a detection output node; and a buffer circuit having a drive transistor and a current source, a gate and a source of the drive transistor being connected respectively to the detection output node and the reference voltage line and outputting a substrate detection voltage.
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