Patent ID: 7349282

Claim:
A power voltage supplier of a semiconductor memory device, comprising: a first power voltage supply line for supplying a first power voltage; a second power voltage supply line for supplying a second power voltage; a first reservoir capacitor for supplying the first and the second power voltages stably; and a reservoir capacitor controller for selectively connecting the first reservoir capacitor either to the first power voltage supply line or the second power voltage supply line, wherein the reservoir capacitor controller includes: a control signal generator for generating a predetermined control signal; and a switching unit for selectively connecting the first reservoir capacitor to the first power voltage line or the second power voltage line in response to the predetermined control signal, wherein the switching unit includes: a first switch for connecting the first reservoir capacitor to the first power voltage supply line when the predetermined control signal is activated; and a second switch for connecting the first reservoir capacitor to the second power voltage line when the predetermined control signal is deactivated.