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    • 71. 发明申请
    • MEMORY CONTROLLER AND DATA STORAGE DEVICE
    • 内存控制器和数据存储设备
    • US20140359381A1
    • 2014-12-04
    • US14355033
    • 2012-03-30
    • Ken TakeuchiShuhei Tanakamaru
    • Ken TakeuchiShuhei Tanakamaru
    • G06F11/07
    • G06F11/076G06F11/073G06F11/1048
    • A memory controller sets an estimated cell error ratio CERest based on an estimated retention time Tret obtained from a calculated bit error ratio BER, a number of rewrite times NW/E, data Datatag of a target cell and data Dataadj of memory cells surrounding the target cell, sets an upper-level page LLRu and a lower-level page LLRl with regard to all bits of read-out one-page data using the set estimated cell error ratio CERest and performs error correction and decoding of data read out from a flash memory using the settings of the upper-level page LLRu and the lower-level page LLRl. This improves the error correction capability, while suppressing an increase in processing time.
    • 存储器控制器基于从计算的误码率BER,重写次数NW / E,目标单元的数据Datatag和围绕目标单元的存储单元的数据Dataadj获得的估计保留时间Tret,设置估计的单元错误率CERest 单元,使用设置的估计单元错误率CERest,针对读出单页数据的所有位设置上级页面LLRu和下级页面LLR1,并执行从闪存读出的数据的纠错和解码 内存使用上级页面LLRu和下级页面LLRl的设置。 这提高了纠错能力,同时抑制了处理时间的增加。
    • 75. 发明授权
    • Non-volatile semiconductor memory
    • 非易失性半导体存储器
    • US08144513B2
    • 2012-03-27
    • US12960882
    • 2010-12-06
    • Koji HosonoHiroshi NakamuraKen TakeuchiKenichi Imamiya
    • Koji HosonoHiroshi NakamuraKen TakeuchiKenichi Imamiya
    • G11C11/34G11C16/06
    • G11C16/0483G11C5/145G11C7/1006G11C11/5621G11C11/5628G11C11/5635G11C11/5642G11C16/10G11C16/24G11C16/26G11C16/3445G11C16/3454G11C16/3459G11C2211/5621G11C2211/5641G11C2211/5642G11C2211/5643
    • A non-volatile semiconductor device has a memory cell array having electrically erasable programmable non-volatile memory cells, reprogramming and retrieval circuits that temporarily store data to be programmed in the memory cell array and sense data retrieved from the memory cell array. Each reprogramming and retrieval circuit has first and second latches that are selectively connected to the memory cell array and transfer data. A controller controls the reprogramming and retrieval circuits on a data-reprogramming operation to and a data-retrieval operation from the memory cell array. Each reprogramming and retrieval circuit has a multilevel logical operation mode and a caching operation mode. In the multilevel logical operation mode, re-programming and retrieval of upper and lower bits of two-bit four-level data is performed using the first and the second latches to store the two-bit four-level data in one of the memory cells in a predetermined threshold level range. In the caching operation mode, data transfer between one of the memory cells selected in accordance with a first address and the first latch is performed while data transfer is performed between the second latch and input/output terminals in accordance with a second address with respect to one-bit two-level data to be stored in one of the memory cells.
    • 非易失性半导体器件具有存储单元阵列,其具有电可擦除可编程非易失性存储器单元,重新编程和检索电路,其临时存储要存储在存储单元阵列中的要编程的数据并感测从存储器单元阵列检索的数据。 每个重新编程和检索电路具有选择性地连接到存储单元阵列和传送数据的第一和第二锁存器。 控制器控制数据重新编程操作中的重新编程和检索电路以及来自存储单元阵列的数据检索操作。 每个重新编程和检索电路都具有多级逻辑操作模式和缓存操作模式。 在多级逻辑操作模式中,使用第一和第二锁存器来执行二位四电平数据的高位和低位的重新编程和检索,以将两位四电平数据存储在存储单元之一中 在预定的阈值电平范围内。 在高速缓存操作模式中,根据第一地址选择的存储器单元之一和第一锁存器之间的数据传输是在第二锁存器和输入/输出端子之间根据第二地址相对于 要存储在其中一个存储单元中的一位二电平数据。
    • 77. 发明申请
    • Non-Volatile Semiconductor Memory
    • 非易失性半导体存储器
    • US20110075488A1
    • 2011-03-31
    • US12960882
    • 2010-12-06
    • Koji HosonoHiroshi NakamuraKen TakeuchiKenichi Imamiya
    • Koji HosonoHiroshi NakamuraKen TakeuchiKenichi Imamiya
    • G11C16/04
    • G11C16/0483G11C5/145G11C7/1006G11C11/5621G11C11/5628G11C11/5635G11C11/5642G11C16/10G11C16/24G11C16/26G11C16/3445G11C16/3454G11C16/3459G11C2211/5621G11C2211/5641G11C2211/5642G11C2211/5643
    • A non-volatile semiconductor device has a memory cell array having electrically erasable programmable non-volatile memory cells, reprogramming and retrieval circuits that temporarily store data to be programmed in the memory cell array and sense data retrieved from the memory cell array. Each reprogramming and retrieval circuit has first and second latches that are selectively connected to the memory cell array and transfer data. A controller controls the reprogramming and retrieval circuits on a data-reprogramming operation to and a data-retrieval operation from the memory cell array. Each reprogramming and retrieval circuit has a multilevel logical operation mode and a caching operation mode. In the multilevel logical operation mode, re-programming and retrieval of upper and lower bits of two-bit four-level data is performed using the first and the second latches to store the two-bit four-level data in one of the memory cells in a predetermined threshold level range. In the caching operation mode, data transfer between one of the memory cells selected in accordance with a first address and the first latch is performed while data transfer is performed between the second latch and input/output terminals in accordance with a second address with respect to one-bit two-level data to be stored in one of the memory cells.
    • 非易失性半导体器件具有存储单元阵列,其具有电可擦除可编程非易失性存储器单元,重新编程和检索电路,其临时存储要存储在存储单元阵列中的要编程的数据并感测从存储器单元阵列检索的数据。 每个重新编程和检索电路具有选择性地连接到存储单元阵列和传送数据的第一和第二锁存器。 控制器控制数据重新编程操作中的重新编程和检索电路以及来自存储单元阵列的数据检索操作。 每个重新编程和检索电路都具有多级逻辑操作模式和缓存操作模式。 在多级逻辑操作模式中,使用第一和第二锁存器来执行二位四电平数据的高位和低位的重新编程和检索,以将两位四电平数据存储在存储单元之一中 在预定的阈值电平范围内。 在高速缓存操作模式中,根据第一地址选择的存储器单元之一和第一锁存器之间的数据传输是在第二锁存器和输入/输出端子之间根据第二地址相对于 要存储在其中一个存储单元中的一位二电平数据。
    • 80. 发明授权
    • Non-volatile semiconductor memory device
    • 非易失性半导体存储器件
    • US07729178B2
    • 2010-06-01
    • US11849891
    • 2007-09-04
    • Yasushi KamedaKen TakeuchiHitoshi ShigaTakuya FutatsuyamaKoichi Kawai
    • Yasushi KamedaKen TakeuchiHitoshi ShigaTakuya FutatsuyamaKoichi Kawai
    • G11C7/10
    • G11C16/102
    • The non-volatile semiconductor memory device has a circuit which maintains and holds the potentials of bit lines, and either ones of even-bit lines or odd-bit lines are connected to the circuit. When the bit line potential holding circuit is connected to even-bit lines and a block copy is performed, data is first outputted to the even-bit lines, and after the potential of the even-bit line is determined, the bit line potential holding circuit operates. Then, biasing of the potential of the even-bit lines is carried out by the bit line potential holding circuit, the potentials of the bit lines are maintained and held. At the same time, data is outputted to the odd-bit lines and the potentials of the odd-bit lines are determined. Then, a program voltage is supplied to a selected word line, and data is simultaneously written (programmed) in the memory cells connected to the even-bit lines, and the memory cells connected to the odd-bit lines.
    • 非易失性半导体存储器件具有维持并保持位线的电位的电路,偶数位线或奇数位线中的任一个与电路连接。 当位线电位保持电路连接到偶数位线并执行块复制时,首先将数据输出到偶数位线,并且在确定偶数位线的电位之后,位线电位保持 电路工作。 然后,通过位线电位保持电路来执行偶数位线的电位的偏置,保持并保持位线的电位。 同时,将数据输出到奇数位线,并且确定奇数位线的电位。 然后,将编程电压提供给所选择的字线,并且数据被同时写入(编程)到连接到偶数位线的存储器单元中,并且存储器单元连接到奇数位线。