CIRCUIT FOR GENERATING INTERNAL VOLTAGE

摘要

PURPOSE: A circuit for generating an internal voltage is provided to reduce a voltage unnecessarily consumed. CONSTITUTION: The circuit for generating an internal voltage provided to an input buffer circuit portion and an internal operation circuit portion of a semiconductor memory device comprises: a first internal voltage generation circuit portion(21) for supplying a supply voltage to a circuit portion operating without an external signal by generating the internal voltage lower than the external supply voltage by a predetermined level; a second internal voltage generation circuit portion(22) for generating the internal voltage when an input buffer circuit portion for buffering another external signal operates only; and a control circuit portion(27) for generating a signal which simultaneously controls activation of the input buffer circuit portion and the second internal voltage generation circuit portion under control of a clock enable signal.