摘要:
A non-volatile semiconductor memory device comprises a redundant memory cell to store address data of a defect cell in a memory cell array. A first decoder circuit is given a first drive voltage to provide a control signal to the redundant memory cell. A dummy memory cell has a threshold voltage corresponding to the redundant memory cell. A second decoder circuit is given a second drive voltage corresponding to the first drive voltage to provide a control signal to the dummy memory cell. A comparator circuit compares data to be read out of the dummy memory cell with data actually read out of the dummy memory cell.
摘要:
A non-volatile semiconductor memory device comprises a redundant memory cell to store address data of a defect cell in a memory cell array. A first decoder circuit is given a first drive voltage to provide a control signal to the redundant memory cell. A dummy memory cell has a threshold voltage corresponding to the redundant memory cell. A second decoder circuit is given a second drive voltage corresponding to the first drive voltage to provide a control signal to the dummy memory cell. A comparator circuit compares data to be read out of the dummy memory cell with data actually read out of the dummy memory cell.
摘要:
A semiconductor storage device according to an embodiment includes multiple memory cells which electrically rewrite data, a well control circuit which outputs an erasure voltage to be applied to a well through an output terminal, a first pump circuit which outputs a voltage set by boosting an input voltage to the output terminal, a second pump circuit which outputs a voltage set by boosting the input voltage to the output terminal and outputs a voltage higher than an output voltage of the first pump circuit, a pump switching detecting circuit which outputs an assist signal to perform a boosting operation on at least one of the first pump circuit and the second pump circuit and an erase pulse control circuit which sets target voltages of the first pump circuit and the second pump circuit, on the basis of setting values to set a target voltage of the erasure voltage.
摘要:
A power circuit includes a reference potential circuit, a step-up circuit, and a conversion circuit. The reference potential circuit generates a reference potential. The step-up circuit generates a desired internal potential by stepping up a power supply potential. The step-up circuit includes a comparison circuit, a differential amplifier circuit, and a switch element. The comparison circuit outputs the result of comparison between a potential and the reference potential. The differential amplifier circuit is turned on or off by the operation control signal. The switch element performs on/off control according to the operation control signal and resets the output potential of the differential amplifier circuit. The conversion circuit converts the of the operation control signal so as to make longer the on period of the differential amplifier circuit and the off period of switch element.
摘要:
A semiconductor memory device includes a memory cell array, first bit lines, second bit lines, a first precharge circuit, a sense amplifier, and a read control circuit. The memory cell array has a first cell array including first memory cells arranged in a matrix and a second cell array including second memory cells. The first bit line electrically connects the first memory cells in a same column. The second bit line electrically connects the second memory cells in a same column. The first precharge circuit precharges the first bit lines in a read operation. The sense amplifier amplifies the data read from the first memory cells in a read operation. The read control circuit precharges and discharges the second bit lines in a read operation and, on the basis of the time required to precharge and discharge the second bit lines, controls the first precharge circuit and the sense amplifier.
摘要:
The present invention relates to a labeling enzyme and a method of detecting and/or quantifying a target substance using this labeling enzyme. The present invention provides a labeling enzyme that catalyzes a reaction of gelling a substrate. By measuring changes in physical properties such as the film thickness and/or refractive index of a film produced by the gelling reaction catalyzed by the labeling enzyme of the present invention, it is possible to quickly and highly sensitively detect and/or quantify a target substance while minimizing the effects of coexisting substances.
摘要:
A semiconductor memory device includes a memory cell array, first bit lines, second bit lines, a first precharge circuit, a sense amplifier, and a read control circuit. The memory cell array has a first cell array including first memory cells arranged in a matrix and a second cell array including second memory cells. The first bit line electrically connects the first memory cells in a same column. The second bit line electrically connects the second memory cells in a same column. The first precharge circuit precharges the first bit lines in a read operation. The sense amplifier amplifies the data read from the first memory cells in a read operation. The read control circuit precharges and discharges the second bit lines in a read operation and, on the basis of the time required to precharge and discharge the second bit lines, controls the first precharge circuit and the sense amplifier.
摘要:
A semiconductor integrated circuit device includes first and second nonvolatile semiconductor memories. The first memory has first and second select transistors and first memory cell transistors. The first memory cell transistor has a first floating gate on a first gate insulating film and a first control gate on a first inter-gate insulating film. The second memory has a third select transistor and a second memory cell transistor. The second memory cell transistor has a second floating gate on a second gate insulating film and a second control gate on a second inter-gate insulating film. The first and second gate insulating films have the same film thickness. The first and second floating gates have the same film thickness. The first and second inter-gate insulating films have the same film thickness. The first and second control gates have the same film thickness.
摘要:
A semiconductor memory device includes memory cells, a memory cell array, word lines, latch circuits, first row decoders, second row decoders, first isolating transistors, and second isolating transistors. The memory cell includes a memory cell transistor having a floating gate and a control gate. The memory cell array includes the memory cells arranged in a matrix. The word line connects in common the control gates of the memory cell transistors in a same row. The first row decoder applies a positive voltage to the word lines in a write operation and in an erase operation. The second row decoder applies a negative voltage to the word lines in a write operation and in an erase operation. The first isolating transistor switches between the first row decoder and the word line. The second isolating transistor switches between the second row decoder and the word line.
摘要:
A semiconductor memory device includes memory cells, a memory cell array, word lines, a row decoder, and first and second MOS transistors. The memory cell has a floating gate and a control gate. The word line connects commonly the control gates. The row decoder decodes a row address signal. The first MOS transistor transfers a first voltage to the word line unselected by the row decoder. The first MOS transistor has a drain connected to the word line and a source to which the first voltage is applied. A back gate bias for the first MOS transistor is controlled independently of a potential at the source of the first MOS transistor. The second MOS transistor transfers a second voltage to the word line selected by the row decoder. The second MOS transistor has a drain connected to the word line and a source to which the second potential is applied.