Patent ID: 7250799
Filing Date: 2007-07-31
Classification: G11C,H02M

Abstract:
1. A semiconductor device for boosting an internal voltage using an external supply voltage, the semiconductor device comprising: a voltage detector for detecting a voltage level of the external supply voltage being applied to the semiconductor device; a pulse generator for being controlled by a logic level value output from the voltage detector and generating a pulse signal having a variable pulse width; an internal voltage generator for generating the internal voltage for driving an internal circuit of the semiconductor device; and a driving unit for providing the external supply voltage to an output terminal of the internal voltage generator that outputs the internal voltage in response to the pulse signal, wherein the voltage detector detects whether the external supply voltage is higher than a specified reference voltage; the pulse width of the pulse signal output from the pulse generator in the event that the voltage level of the external supply voltage is higher than the reference voltage is shorter than the pulse width of the pulse signal output from the pulse generator in the event that the voltage level of the external supply voltage is lower than the reference voltage; and the driving unit operates only a period of the pulse width of the pulse signal.