Patent ID: 8717003

Claim:
A voltage regulator circuit comprising: a first pulse generator configured to output a pulse whose level remains unchanged when an input signal of a first circuit is in a first period, and whose level changes from a second level to a first level when an edge of the input signal of the first circuit is detected after the first period; a second pulse generator configured to output a pulse from a time that the pulse output by the first pulse generator becomes the first level until a second period elapses; a first field-effect transistor having a source connected to a power supply potential node, and a drain connected to a power supply potential terminal of the first circuit; a first switch configured to cause a potential at a gate of the first field-effect transistor to be a first potential, based on the pulse output by the second pulse generator, the pulse serving as a control signal; and a third pulse generator configured to output a pulse from a time that a reset signal of the first circuit changes until a third period elapses, wherein the first switch forces the potential at the gate of the first field-effect transistor to be the first potential, using the pulse output by the second pulse generator and the pulse output by the third pulse generator as control signals.