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US 7,548,466 B2Granted
Flash memory device and voltage generating circuit for the same
AssigneeSamsung Electronics Co., Ltd.
InventorsSang-Kug Park, Dae-Han Kim
Life of this patent
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Abstract
A flash memory device includes a memory cell array including a plurality of memory cells. The flash memory device also includes a voltage generating circuit which generates a plurality of constant voltages to be applied to the memory cell array, the voltage generating circuit including a plurality of voltage regulators which generate at least two constant voltages, each having a constant voltage difference.
Claims17
A flash memory device comprising:
- a memory cell array including a plurality of memory cells;
- and
- a voltage generating circuit which generates a plurality of constant voltages to be applied to the memory cell array, the voltage generating circuit including a plurality of voltage regulators which generate at least two constant voltages, each having a constant voltage difference,
- wherein each of the voltage regulators generates a first constant voltage during a standby period and generates a first voltage and a second voltage having a constant voltage difference relative to the first voltage during an active period.
1 more element
A voltage generating circuit comprising:
- a charge pump which generates a high voltage higher than a power supply voltage through a charge pumping operation;
- a first-type voltage regulator which divides a voltage generated from the charge pump to generate a plurality of control signals;
- a plurality of second-type voltage regulators, wherein each of the plurality of second-type voltage regulators divides a voltage generated from the charge pump to simultaneously generate at least two constant voltages;
- and
- a controller which controls the charge pumping operation in response to the control signals,
- wherein the second-type regulators share a voltage-dividing path used to generate the at least two constant voltages.
3 more elements
A voltage generating circuit comprising:
- a charge pump which generates a high voltage higher than a power supply voltage through a charge pumping operation;
- a first-type voltage regulator which divides a voltage generated from the charge pump to generate a plurality of control signals;
- a plurality of second-type voltage regulators each dividing a voltage generated from the charge pump to generate at least two constant voltages;
- and
- a controller which controls the charge pumping operation in response to the control signals, wherein the second-type regulators share a voltage-dividing path used to generate the at least two constant voltages, and
- wherein each of the second-type voltage regulators generates a first constant voltage during a standby period and generates a first voltage and a second voltage having a constant voltage difference relative to the first voltage during an active period.
3 more elements
Dependencies are inferred from the claim text.