Patent ID: 8040176

Claim:
An internal voltage generating circuit comprising: a standard voltage generating circuit operable to generate a standard voltage having temperature dependence; an analog-to-digital conversion circuit operable to convert the standard voltage into a digital value; an adder circuit operable to add a basic digital value defining a level of an internal voltage to be generated, to an output digital value of the analog-to-digital conversion circuit; and a power supply circuit operable to perform digital-to-analog conversion of an output value of the adder circuit and to generate the internal voltage based on the analog conversion voltage, wherein the standard voltage generating circuit comprises: a circuit operable to generate, from a reference voltage not having temperature dependence, a standard voltage having temperature dependence, and wherein the power supply circuit comprises: an internal power supply operable to generate a voltage corresponding to the reference voltage not having the temperature dependence at a first power node; a resistive subdivision circuit operable to generate a plurality of levels of subdivided voltage by resistive subdivision of voltage between the first power node and a second power node; and a selection circuit operable to select one of the plural levels of the subdivided voltage to generate the analog conversion voltage, according to an output digital value outputted from the adder circuit.