Abstract:
A non-volatile memory device includes a set pulse generator configured to generate a set pulse, a reset pulse generator configured to generate a reset pulse based on the set pulse, and a write driver block configured to write second data to a second non-volatile memory cell using the reset pulse, while writing first data to a first non-volatile memory cell using the set pulse.
Abstract:
A method of operating a phase change random access memory (PRAM) device includes performing a program operation to store data in selected PRAM cells of the device, wherein the program operation comprises a plurality of sequential program loops. The method further comprises suspending the program operation in the middle of the program operation, and after suspending the program operation, resuming the program operation in response to a resume command.
Abstract:
A method for cleaning a filtering membrane, contaminated by contaminants including inorganic and organic materials during a fluid-filtering process, is disclosed, the method comprises cleaning the filtering membrane by using a first cleaning solution of pH 6˜9 so as to remove the organic material from the filtering membrane; and cleaning the filtering membrane by using a second acid cleaning solution so as to remove the inorganic material from the filtering membrane, wherein the cleaning method of the present invention uses the first cleaning solution having pH 6˜9 instead of a strong-alkaline cleaning solution so as to prevent the filtering membrane from being damaged, and also uses the cleaning solution maintained at a relatively low temperature instead of hot water so as to improve economical efficiency by reduction of energy consumption.
Abstract:
Phase-change and resistance-change random access memory devices are provided which include a phase-change or resistance-change memory cell array and a sense amplifier that is configured to amplify data read from the phase-change memory cell array. These random access memory devices are configured to read data from a first word line of the phase-change or resistance-change memory cell array and to insert a dummy burst in which no data is read when a first boundary crossing occurs during a burst mode operation. Related methods of operating phase-change and/or resistance-change random access memory devices in burst mode are also provided.
Abstract:
A semiconductor memory device includes a memory cell array, a mode setting circuit, a parity data generation unit, and a data error detection and correction unit. The memory cell array has a plurality of first memory banks for storing normal data, and a predetermined number of second memory banks less than the number of the first memory banks for storing parity data according to control of a first flag signal. The mode setting circuit sets the first flag signal and a second flag signal controlling based on whether a separate memory bank is used to store the parity data in the second memory banks. The parity data generation unit receives normal write data during a write operation, generates parity data with respect to the normal write data in response to the second flag signal, and outputs the normal data and the parity data. The data error detection and correction unit receives normal read data and parity read data read from the memory cell array during a read operation, detects errors of the normal read data in response to the second flag signal, corrects the normal read data when the errors are detected, and outputs the corrected read data.
Abstract:
Provided are a nonvolatile memory and related method of programming same. The nonvolatile memory includes a memory cell array with a plurality of nonvolatile memory cells and a write circuit. The write circuit is configured to write first logic state data to a first group of memory cells during a first program operation using an internally generated step-up voltage, and second logic state data to a second group of memory cells during a second program operation using an externally supplied step-up voltage.
Abstract:
A phase-change random access memory device is provided. The phase-change random access memory device includes a global bit line connected to a write circuit and a read circuit, multiple local bit lines, each being connected to multiple phase-change memory cells, and multiple column select transistors selectively connecting the global bit line with each of the multiple local bit lines, each column select transistor having a resistance that varies depending on its distance from the write circuit and the read circuit.
Abstract:
A method programs a phase change memory device. The method comprises receiving program data for selected memory cells; generating bias voltages based on reference cells; sensing read data stored in a selected memory cell by supplying the selected memory cell with verification currents determined by the bias voltages; determining whether the read data is identical to the program data; and upon determining that the program data for one or more of the selected memory cells is not identical to the corresponding read data, iteratively applying a write current to the one or more selected memory cells.
Abstract:
A method of operating a phase change random access memory (PRAM) device includes performing a program operation to store data in selected PRAM cells of the device, wherein the program operation comprises a plurality of sequential program loops. The method further comprises suspending the program operation in the middle of the program operation, and after suspending the program operation, resuming the program operation in response to a resume command.
Abstract:
A semiconductor memory device includes a memory cell array, a mode setting circuit, a parity data generation unit, and a data error detection and correction unit. The memory cell array has a plurality of first memory banks for storing normal data, and a predetermined number of second memory banks less than the number of the first memory banks for storing parity data according to control of a first flag signal. The mode setting circuit sets the first flag signal and a second flag signal controlling based on whether a separate memory bank is used to store the parity data in the second memory banks. The parity data generation unit receives normal write data during a write operation, generates parity data with respect to the normal write data in response to the second flag signal, and outputs the normal data and the parity data. The data error detection and correction unit receives normal read data and parity read data read from the memory cell array during a read operation, detects errors of the normal read data in response to the second flag signal, corrects the normal read data when the errors are detected, and outputs the corrected read data.