Patent ID: 9086713
Filing Date: 2015-07-21
Classification: G05F

Abstract:
1. An internal voltage generation circuit, the circuit comprising: a first internal voltage driver configured to be driven by a first power supply voltage and configured to drive an internal voltage to the first power supply voltage when the internal voltage is less than a first target level; and a second internal voltage driver configured to be driven by a second power supply voltage and configured to drive the internal voltage to the second power supply voltage when the internal voltage is greater than or equal to the first target level and is less than a second target level, wherein the second internal voltage driver includes: a second comparison signal generator configured to be driven by the second power supply voltage and configured to compare the internal voltage with a second reference voltage to generate a second comparison signal; a pull-up signal generator configured to generate a pull-up signal enabled when both the first and second comparison signals are disabled; and a second driver configured to be driven by the second power supply voltage and configured to drive the internal voltage in response to the pull-up signal.