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    • 9. 发明授权
    • Phase-changeable memory device and read method thereof
    • 相变存储器件及其读取方法
    • US07391644B2
    • 2008-06-24
    • US11605212
    • 2006-11-29
    • Woo-Yeong ChoByung-Gil ChoiDu-Eung KimHyung-Rok OhBeak-Hyung ChoYu-Hwan Ro
    • Woo-Yeong ChoByung-Gil ChoiDu-Eung KimHyung-Rok OhBeak-Hyung ChoYu-Hwan Ro
    • G11C11/00
    • G11C8/10G11C13/0004G11C13/004G11C2013/0054G11C2213/72
    • Disclosed is a phase-changeable memory device and a related method of reading data. The memory device is comprised of memory cells, a high voltage circuit, a precharging circuit, a bias circuit, and a sense amplifier. Each memory cell includes a phase-changeable material and a diode connected to a bitline. The high voltage circuit provides a high voltage from a power source. The precharging circuit raises the bitline up to the high voltage after charging the bitline up to the power source voltage. The bias circuit supplies a read current to the bitline by means of the high voltage. The sense amplifier compares a voltage of the bitline with a reference voltage by means of the high voltage, and reads data from the memory cell. The memory device is able to reduce the burden on the high voltage circuit during the precharging operation, thus assuring a sufficient sensing margin during the sensing operation.
    • 公开了一种可变相存储器件和读取数据的相关方法。 存储器件包括存储器单元,高压电路,预充电电路,偏置电路和读出放大器。 每个存储单元包括相位可变材料和连接到位线的二极管。 高压电路从电源提供高电压。 预充电电路将位线充电至电源电压后,将位线升高至高电压。 偏置电路通过高电压向位线提供读取电流。 读出放大器通过高电压将位线的电压与参考电压进行比较,并从存储单元读取数据。 存储器件能够减少在预充电操作期间对高压电路的负担,从而在感测操作期间确保足够的感测余量。
    • 10. 发明授权
    • Data read circuit for use in a semiconductor memory and a memory thereof
    • 用于半导体存储器的数据读取电路及其存储器
    • US06982913B2
    • 2006-01-03
    • US10943300
    • 2004-09-17
    • Hyung-Rok OhWoo-Yeong ChoChoong-Keun Kwak
    • Hyung-Rok OhWoo-Yeong ChoChoong-Keun Kwak
    • G11C7/00
    • G11C13/004G11C7/06G11C7/12G11C13/0004G11C13/0026G11C2013/0054G11C2207/005
    • A data read circuit and method for use in a semiconductor memory device that has a memory cell array are provided. The circuit includes a selector for selecting a unit cell within the memory cell array in response to an address signal; a clamping unit for supplying a clamp voltage having a level for a read operation to a bit line of the selected unit cell in response to a clamp control signal; a precharge unit for precharging a sensing node to a voltage having a power source level in response to a control signal of a first state in a precharge mode, and compensating through the sensing node for a reduced quantity of current at the bit line in response to a control signal of a second state in a data sensing mode; and a sense amplifier unit for comparing a level of the sensing node with a reference level, and for sensing data stored in the selected unit cell.
    • 提供了一种用于具有存储单元阵列的半导体存储器件中的数据读取电路和方法。 该电路包括:选择器,用于响应于地址信号选择存储单元阵列内的单位单元; 夹紧单元,用于响应于钳位控制信号,将具有用于读取操作的电平的钳位电压提供给所选择的单位单元的位线; 预充电单元,用于响应于在预充电模式中的第一状态的控制信号而将感测节点预充电到具有电源电平的电压,并且响应于位线在位线处减小的电流量补偿 在数据感测模式中的第二状态的控制信号; 以及感测放大器单元,用于将感测节点的电平与参考电平进行比较,并且用于感测存储在所选择的单位单元中的数据。