Patent ID: 7580299

Claim:
A circuit for generating a reference voltage in a memory device, the circuit comprising: a switching section configured to control a supply of a power supply voltage in response to a control signal; a first voltage generator configured to generate a reference voltage and a first voltage by dividing the power supply voltage provided through the switching section, the first voltage having a negative temperature coefficient characteristic; a second voltage generator configured to generate the reference voltage and a second voltage having a positive temperature coefficient characteristic, wherein the second voltage generator comprises: a variable resistor section coupled between a first node from which the reference voltage is output and a second node from which the second voltage is output, wherein the variable resistor section comprises at least one resistor, each resistor being operated in accordance with a cutting of a fuse, and a plurality of transistors coupled in parallel between the second node and a around voltage; and a comparator configured to compare the first voltage with the second voltage, and control the switching section in accordance with the comparison result.