摘要:
A semiconductor memory device includes a memory cell array including an even page cell group and an odd page cell group, and a page buffer configured to read data stored in memory cells of the even page cell group and the odd page cell group and store the read data. The page buffer comprises a first latch configured to store first even page data of the even page cell group when a first read operation is performed, a second latch configured to store odd page data of the odd page cell group when a second read operation is performed, and a third latch configured to store second even page data of the even page cell group when a third read operation is performed.
摘要:
A semiconductor memory device includes a memory cell array including an even page cell group and an odd page cell group, and a page buffer configured to read data stored in memory cells of the even page cell group and the odd page cell group and store the read data. The page buffer comprises a first latch configured to store first even page data of the even page cell group when a first read operation is performed, a second latch configured to store odd page data of the odd page cell group when a second read operation is performed, and a third latch configured to store second even page data of the even page cell group when a third read operation is performed.
摘要:
The present invention relates to a method of programming a flash memory device. According to the present invention, after a program operation is completed, a program verify operation is repeatedly performed, wherein a threshold voltage of a programmed memory cell is also detected. If there are memory cells whose threshold voltage becomes low as a result of the detection, the program operation is again performed on a corresponding memory cell. It is thus possible to obtain a uniform distribution characteristic of a threshold voltage. Furthermore, a program verify operation is performed with a compare voltage being set higher than a target voltage initially so that a threshold voltage of a memory cell is sufficiently higher than the target voltage. The program verify operation is again performed while lowering the compare voltage according to the repetition number. It is thus possible to prevent normally programmed cells from being again excessively programmed.
摘要:
A program operation and a program verification operation are repeatedly performed. The program verification operation is performed on memory cells including pass cells to obtain a uniform distribution characteristic of a threshold voltage. Furthermore, the program verification operation is performed with a compare voltage being set higher than a target voltage initially so that a threshold voltage of a memory cell is sufficiently higher than the target voltage. The program verification operation is again performed lowering the compare voltage according to the repetition number. Thus, normally programmed cells are prevented from being again excessively programmed.
摘要:
Techniques, systems and apparatus are described for adjusting auto white balance (AWB). An AWB adjusting device includes a map setting unit to perform map-setting on a number of light-source boxes that is at least M times greater than a number of registers by performing map-switching. M is an integer greater than or equal to 2. The AWB adjusting device includes a pixel counting unit for counting a number of white pixels of a standard image contained in each light-source box with map-setting. The AWB adjusting device includes a light-source selection unit to select a light source based on a maximum light-source box selected from the number of light-source boxes having a greatest number of the white pixels. The AWB adjusting device includes a balance gain applying unit to calculate a red gain and a blue gain based on a mapping value of the maximum light-source box to adjust AWB.
摘要:
A method of programming a multi-level flash memory using a sensing circuit according to the present invention performs an automatic verification program method of performing verification while performing a program. The method can reduce the power consumption by detecting a program data stored at a register to stop an operation of the sensing circuit for memory cells for which the program is completed. Also, a method of reading the flash memory senses the state of the threshold voltage of a cell using the sense amplifier used in the program operation while increasing or lowering the voltage applied to a control gate step-by-step and then stores the level value generated in a counter at the registers depending on its state, wherein an operation of the sensing circuit for the memory cells for which the program is completed is stopped. Therefore, the present invention can reduce the power consumption and allow a multi-level read to be implemented on an actual array with a simple sense amplifier structure step-by-step. In addition, the present invention can reduce the power consumption while simplifying the circuit construction by allowing a program/read operation to be simultaneously implemented on a single sense amplifier circuit.
摘要:
A method of programming a multi-level flash memory using a sensing circuit according to the present invention performs an automatic verification program method of performing verification while performing a program. The method can reduce the power consumption by detecting a program data stored at a register to stop an operation of the sensing circuit for memory cells for which the program is completed. Also, a method of reading the flash memory senses the state of the threshold voltage of a cell using the sense amplifier used in the program operation while increasing or lowering the voltage applied to a control gate step-by-step and then stores the level value generated in a counter at the registers depending on its state, wherein an operation of the sensing circuit for the memory cells for which the program is completed is stopped. Therefore, the present invention can reduce the power consumption and allow a multi-level read to be implemented on an actual array with a simple sense amplifier structure step-by-step. In addition, the present invention can reduce the power consumption while simplifying the circuit construction by allowing a program/read operation to be simultaneously implemented on a single sense amplifier circuit.
摘要:
A nonvolatile memory device includes a comparison unit configured to compare a reference voltage and a voltage of each of a plurality of nodes of a sample memory cell string, a state storage unit configured to store state information of each of memory cells depending on the corresponding comparison result of the comparison unit, and a high voltage generation unit configured to change a program start voltage depending on data stored in the state storage unit.
摘要:
Techniques, systems and apparatus are described for adjusting auto white balance (AWB). An AWB adjusting device includes a map setting unit to perform map-setting on a number of light-source boxes that is at least M times greater than a number of registers by performing map-switching. M is an integer greater than or equal to 2. The AWB adjusting device includes a pixel counting unit for counting a number of white pixels of a standard image contained in each light-source box with map-setting. The AWB adjusting device includes a light-source selection unit to select a light source based on a maximum light-source box selected from the number of light-source boxes having a greatest number of the white pixels. The AWB adjusting device includes a balance gain applying unit to calculate a red gain and a blue gain based on a mapping value of the maximum light-source box to adjust AWB.
摘要:
A nonvolatile memory device includes a comparison unit configured to compare a reference voltage and a voltage of each of a plurality of nodes of a sample memory cell string, a state storage unit configured to store state information of each of memory cells depending on the corresponding comparison result of the comparison unit, and a high voltage generation unit configured to change a program start voltage depending on data stored in the state storage unit.