Voltage supply circuit and flash memory device including the same, and method of supplying operating voltage
AssigneeHynix Semiconductor Inc.
InventorChae-Kyu Jang
Life of this patent
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Abstract
A voltage supply circuit includes a voltage generator and a controller. The voltage generator is configured to pump an externally input voltage and store the pumped external voltage as a first voltage having a set voltage level, before power-up begins, or pump the external voltage, add the pumped voltage to the stored voltage, and output the added voltage as an operating voltage. The controller is configured to output a first control signal to drive the voltage generator or stop operation of the voltage generator, according to an operating state.
Claims24
A voltage supply circuit comprising:
- a voltage generator configured to
- before power-up begins, pump an externally input voltage and store the pumped external voltage as a first voltage, wherein the first voltage has a set voltage level, or
- pump the externally input voltage, add the pumped voltage to a stored voltage, and output the added voltage as an operating voltage;
- and
- a controller configured to output a first control signal to drive the voltage generator or stop an operation of the voltage generator, wherein the controller outputs the first control signal or stops the operation of the voltage generator according to an operating state,
- wherein the voltage generator comprises
- a voltage rising output unit for pumping and outputting the external voltage, and
- a voltage storage unit for storing the voltage generated by the voltage rising output unit.
A flash memory device comprising:
- a memory cell array including a plurality of memory cells respectively connected to a plurality of bit line pairs and a plurality of word lines;
- a plurality of page buffer circuits corresponding to the plurality of bit line pairs, respectively, and configured to program data into the memory cells or read data stored in the memory cells;
- a voltage supply unit having a voltage generator and a controller for controlling the voltage generator, wherein the voltage generator comprises
- a voltage rising output unit for pumping and outputting the external voltage, and
- a voltage storage unit for storing the voltage generated by the voltage rising output unit;
- and
- Y decoder circuits connected to the plurality of page buffer circuits, respectively, and a data I/O line, the Y decoder circuits being configured to transmit program data to the page buffer circuits and output read data received from the page buffer circuits to the data I/O line.
A method of supplying an operating voltage of a flash memory device, the method comprising:
- raising a voltage level using an external voltage before power-up and generating a first voltage;
- in the event that a current operating state of a flash memory device is an idle state, pumping the external voltage, adding the pumped voltage to the first voltage, and generating the added voltage as a second voltage;
- and
- in the event that a current operating state of the flash memory device shifts from an idle state to an active state, pumping the external voltage, adding the pumped voltage to the second voltage, and generating an operating voltage for program or read.
Dependencies are inferred from the claim text.