| 摘要 |
A core voltage generator is provided to generate a stable core voltage by assuring a sufficient phase margin and gain margin regardless of the variation of a power supply voltage. A comparison unit(20) performs differential comparison between a reference voltage and a feedback core voltage. An amplification unit(21) outputs a core voltage using a power supply voltage based on a signal outputted from the comparison unit. A power supply voltage detector detects the level of the power supply voltage. A phase compensation unit(24A,24B) is connected between an input port and an output port of the amplification unit, and is controlled by an output signal of the power supply voltage detector.
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