| 摘要 |
An object of the present invention is to reduce variations in the value of the output potential VDD of a regulator circuit including a bias circuit referring threshold voltage. The regulator circuit includes a bias circuit referring threshold voltage, an error amplifier, an output control circuit, and a feedback voltage divider. Further, the regulator circuit uses an n-type transistor and p-type transistor which offer small variations in the value obtained by Vthn+|Vthp|. The feedback voltage divider includes a diode-connected p-type transistor. The increase in the threshold voltage Vthn of n-type transistors leads to the increase in the threshold voltage Vthp of the p-type transistor. Therefore, the on resistance of the p-type transistor is reduced. As a result, the fluctuations in the output potential VDD is suppressed.
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