Power supply circuit stably supplying power supply potential even to load consuming rapidly changing current and semiconductor memory device with same

摘要

A power supply circuit according to the present invention includes: a potential difference amplifying circuit amplifying a potential difference between an internal power supply potential and a reference potential to output the amplified potential difference to a control node; a current supply transistor supplying a current according to a potential level of the control node to an internal power supply line; and a forced current supply control circuit forcibly performing current supply by the current supply transistor through adjustment of a potential level of the control node. The forced current supply control circuit begins forced current supply to the internal power supply line at the timing based on activation of a word line activation signal to be activated in advance of activation of a sense amplifier, which is a load.