| 摘要 |
A semiconductor device is provided to compensate for fluctuation of a power supply voltage in a broader region by digitizing information regarding fluctuation of a power supply voltage while using an ADC(analog-to-digital converter) and by decoding the digitized value and selecting a transistor block suitable for a level of a corresponding power supply voltage. An ADC unit(20) receives a power supply voltage and outputs N-bit digital words(N is a natural number) corresponding to the level of the power supply voltage. A decoding unit(30) decodes the N-bit digital words to output M-bit block selection signals(M is 2^N). A plurality of compensation blocks(40) are selectively enabled according to each bit of the block selection signals. A low pass filter(10) removes a noise component from the power supply voltage to apply the noise-removed power supply voltage to the ADC unit.
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