Semiconductor memory device with internal voltage generator
AssigneeHynix Semiconductor Inc.
InventorChang-Ho Do
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Abstract
An internal voltage generator for use in a semiconductor memory device, includes: an internal voltage generation unit for generating an internal voltage by performing a charge pumping operation to a power supply voltage based on a result of comparing the internal voltage with a reference voltage; and an initial internal voltage generation unit for supplying the power supply voltage as the internal voltage based on a result of comparing the internal voltage with the power supply voltage when an operating voltage supplied to the semiconductor memory device is lower than a predetermined voltage level.
Claims12
An internal voltage generator for use in a semiconductor memory device, comprising:
- an internal voltage generation unit for generating an internal voltage by performing a charge pumping operation to a power supply voltage based on a result of comparing a voltage level of the internal voltage with a voltage level of a reference voltage;
- and
- an initial internal voltage generation unit for supplying the power supply voltage as the internal voltage based on a result of comparing the voltage level of the internal voltage with a voltage level of the power supply voltage when an operating voltage supplied to the semiconductor memory device is lower than a predetermined voltage level.
An internal voltage generator for use in a semiconductor memory device, comprising:
- an internal voltage generation unit for generating an internal voltage by performing a charge pumping operation to a power supply voltage based on a result of comparing a voltage level of the internal voltage with a voltage level of a reference voltage;
- and
- an initial internal voltage generation unit for initializing the voltage level of the internal voltage until an operating voltage supplied to the semiconductor memory device reaches a predetermined voltage level,
- wherein the initial internal voltage generation unit outputs the power supply voltage as the internal voltage in case that the voltage level of the internal voltage is higher than that of the power supply voltage.
An internal voltage generator for use in a semiconductor memory device, comprising:
- an internal voltage generation unit for generating an internal voltage by performing a charge pumping operation to a power supply voltage based on a result of comparing a voltage level of the internal voltage with a voltage level of a reference voltage;
- and
- an initial internal voltage generation unit for supplying the power supply voltage as the internal voltage based on a result of comparing the voltage level of the internal voltage with a voltage level of the power supply voltage when an operating voltage supplied to the semiconductor memory device is lower than a predetermined voltage level,
- wherein the internal voltage generation unit includes a level detector for comparing the voltage level of the internal voltage with the voltage level of the reference voltage;
- and the initial internal voltage generation unit includes an initial level detection unit for comparing the voltage level of the internal voltage with the voltage level of the power supply voltage.
Dependencies are inferred from the claim text.