| 摘要 |
PROBLEM TO BE SOLVED: To prevent sharp changes in booster voltage by providing a detector for a voltage boosting circuit with a compensating current which supplies a section, including an option element. SOLUTION: For preventing the potential of a signal line VPP from increasing, a second detector 104 is provided with a compensating current supplying section 141. The section 141 is coupled between the drain of a PMOS transistor 239 and a node 256, whereby the potential at the node 256 is compensated for via the section 141. Therefore, the potential gradient of the line VPP is controlled, in such a way that it exhibits a mild ramp as an internal power source voltage VCC increases, thereby eliminating the possibility of the potential of the line VPP rising sharply. As a result, the lifetime and reliability of a semiconductor device having the voltage boosting circuit are prevented from reducing, as well as its yield.
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