Patent ID: 7414897

Claim:
An internal voltage generator for use in a semiconductor memory device, comprising: a normal level detecting unit for detecting a level of an internal voltage relative to a first reference voltage; a normal driver for supplying the internal voltage under the control of the normal level detecting unit; an active period detecting unit for detecting an active period to output an active period signal; a first active level detecting unit for detecting the level of the internal voltage relative to the first reference voltage in response to the active period signal; a first active driver for supplying the internal voltage under the control of the first active level detecting unit; a second active level detecting unit for detecting the level of the internal voltage relative to a second reference voltage in response to the active period signal; an active driving controlling unit for activating a first active driving signal for a predetermined initial time of the active period in response to the active period signal and an output signal of the second active level detecting unit and for activating the first active driving signal depending on the internal voltage relative to the reference voltage after the predetermined initial time of the active period is passed; and a second active driver for supplying the internal voltage in response to the first active driving signal.