| 摘要 |
PURPOSE: A reference voltage generator in a semiconductor integrated circuit is provided to turn off a reference voltage generation circuit in an operation period where the reference voltage does not have to be generated, thereby reducing power consumption. CONSTITUTION: A first reference voltage generating unit (200) generates a reference voltage (VREFDQ) in a normal mode. The first reference voltage generation unit is enabled in response to a self-refresh signal. A second reference voltage generating unit (250) additionally drives an output terminal of the first reference voltage generation unit in an initial reference voltage setting time period. The second reference voltage generation unit is enabled in response to a boost control signal that is activated for a predetermined period from the initial reference voltage setting time. [Reference numerals] (200) First reference voltage generating unit; (250) Second reference voltage generating unit
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