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US 2014/0176101 A1Published application
Internal voltage generation circuits
AssigneeSK hynix Inc.
InventorYoung Geun CHOI
Life of this patent
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Abstract
An internal voltage generation circuit utilizing dual comparison signal generators and dual drivers to drive the internal voltage to a selected level. The second driver is responsive to a control signal derived from both of the comparison signal generators. The internal voltage generation circuit overcomes a problem with prior art circuits that may not permit the internal voltage to be driven to the selected level over a range of power supply voltages.
Claims22
An internal voltage generation circuit, the circuit comprising:
- a first internal voltage driver configured to drive an internal voltage to a first power supply voltage when the internal voltage is less than a first target level;
- and
- a second internal voltage driver configured to drive the internal voltage to a 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.
An internal voltage generation circuit comprising:
- a first comparison signal generator that compares an internal voltage with a first reference voltage to generate a first comparison signal;
- a second comparison signal generator that compares the internal voltage with a second reference voltage to generate a second comparison signal;
- a first driver that drives the internal voltage in response to the first comparison signal;
- and
- a second driver that drives the internal voltage in response to a control signal derived from the first and second comparison signals.
2 more elements
Dependencies are inferred from the claim text.