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    • 2. 发明授权
    • Drain side sensing scheme for virtual ground flash EPROM array with adjacent bit charge and hold
    • 具有相邻位充电和保持的虚拟接地闪速EPROM阵列的漏极检测方案
    • US06510082B1
    • 2003-01-21
    • US09999869
    • 2001-10-23
    • Binh Q. LePau-Ling ChenMichael A. Van BuskirkSantosh K. YachareniMichael S. C. ChungKazuhiro KuriharaShane Hollmer
    • Binh Q. LePau-Ling ChenMichael A. Van BuskirkSantosh K. YachareniMichael S. C. ChungKazuhiro KuriharaShane Hollmer
    • G11C1604
    • G11C16/0491G11C16/28
    • A system is disclosed for producing an indication of the logical state of a flash memory cell for virtual ground flash memory operations. The system comprises a bit line charge and hold circuit which is operable to apply a read sense voltage (e.g., about 1.2 volts) to a bit line associated with the drain terminal of a cell of the flash array adjacent to the cell which is sensed, wherein the applied drain terminal voltage is substantially the same as the cell sense voltage (e.g., about 1.2 volts) applied to the drain terminal bit line of the selected memory cell to be sensed. The system further includes a selective bit line decode circuit which is operable to select the bit lines of a memory cell to be sensed and the bit line of an adjacent cell, and a core cell sensing circuit which is operable to sense a core cell sense current at a bit line associated with a drain terminal of the selected memory cell to be sensed during memory read operations, and produce an indication of the flash memory cell logical state, which is substantially independent of charge sharing leakage current to an adjacent cell.
    • 公开了一种用于产生用于虚拟接地闪速存储器操作的闪存单元的逻辑状态的指示的系统。 该系统包括位线充电和保持电路,其可操作以将读取感测电压(例如,约1.2伏特)施加到与所感测的电池相邻的闪光阵列的单元的漏极端子相关联的位线, 其中所施加的漏极端子电压基本上与施加到要被感测的所选择的存储器单元的漏极端子位线的单元检测电压(例如,约1.2伏特)相同。 该系统还包括选择性位线解码电路,其可操作以选择要感测的存储器单元的位线和相邻单元的位线;以及核心单元感测电路,其可操作以感测核心单元感测电流 在与存储器读取操作期间被感测的所选择的存储器单元的漏极端子相关联的位线处,并产生闪存单元逻辑状态的指示,其基本上与相邻单元的电荷共享泄漏电流无关。
    • 4. 发明授权
    • Voltage boost circuit using supply voltage detection to compensate for supply voltage variations in read mode voltage
    • 电压升压电路使用电源电压检测来补偿读取模式电压中的电源电压变化
    • US06535424B2
    • 2003-03-18
    • US09915018
    • 2001-07-25
    • Binh Q. LeMasaru YanoSantosh K. Yachareni
    • Binh Q. LeMasaru YanoSantosh K. Yachareni
    • G11C1604
    • G11C16/08G11C8/08
    • Flash memory array systems and methods are disclosed for producing a supply regulated boost voltage, wherein the application of a supply voltage to a supply voltage level detection circuit (e.g., analog to digital converter, digital thermometer) which is used to generating one or more supply voltage level detection signals from measurement of the supply voltage level applied to the voltage boost circuit, which may be used as a boosted wordline voltage for the read mode operations of programmed memory cells, and wherein the supply voltage level detection signals are applied to a boosted voltage compensation circuit to generate one or more boosted voltage compensation signals which are applied to a voltage boost circuit operable to generate a regulated boosted voltage for a flash memory array of programmed core cells. Thus, a fast compensation means is disclosed for the VCC power supply variations typically reflected in the output of the boost voltage circuit supplied to the word line of the flash memory array, thereby generating wordline voltages during the read mode which are substantially independent of variations in the supply voltage.
    • 闪存阵列系统和方法被公开用于产生电源调节升压电压,其中将电源电压施加到用于产生一个或多个电源的电源电压电平检测电路(例如,模数转换器,数字温度计) 电压电平检测信号来自测量施加到升压电路的电源电压电平,其可以用作用于编程存储器单元的读取模式操作的升压字线电压,并且其中电源电压电平检测信号被施加到升压 电压补偿电路以产生一个或多个升压电压补偿信号,所述升压电压补偿信号被施加到升压电路,所述升压电路可操作以产生用于编程核心单元的闪存阵列的调节升压电压。 因此,公开了一种快速补偿装置,用于通常反映在提供给闪速存储器阵列的字线的升压电压电路的输出中的VCC电源变化,从而在读取模式期间产生字线电压,其基本上与 电源电压。
    • 5. 发明授权
    • Method to reduce capacitive loading in flash memory X-decoder for accurate voltage control at wordlines and select lines
    • 减少闪存中的电容负载的方法X解码器,用于在字线和选择线上进行精确的电压控制
    • US06208561B1
    • 2001-03-27
    • US09593303
    • 2000-06-13
    • Binh Q. LeKazuhiro KuriharaPau-Ling Chen
    • Binh Q. LeKazuhiro KuriharaPau-Ling Chen
    • G11C1606
    • G11C16/08
    • An apparatus and a method for reducing capacitive loading in a Flash memory X-decoder so as to accurately control the voltages as selected wordlines and block select lines are provided. A decoding structure separately applies a first boosted voltage to the wordline N-well region and a second boosted voltage to the selected wordline so as to reduce capacitive loading on the selected wordline due to heavy capacitive loading associated with the wordline N-well region. The decoding structure further applies a third boosted voltage to the select gate N-well region and a fourth boosted voltage to the block select line so as to reduce capacitive loading on the block select line due to heavy capacitive loading associated with the select gate N-well region. As a consequence, an accurate voltage can be created quickly at the selected wordline since its capacitive loading path is very small.
    • 提供了一种用于降低闪存X解码器中的电容负载以便精确地将电压控制为选择的字线和块选择线的装置和方法。 解码结构分别将第一升压电压施加到字线N阱区域,并将第二升压电压施加到所选择的字线,以便由于与字线N阱区域相关联的重电容性负载而减小所选字线上的容性负载。 解码结构还将第三升压电压施加到选择栅极N阱区域,并将第四升压电压施加到块选择线,以便由于与选择栅极N相关联的重电容负载而减小块选择线上的电容负载, 井区。 因此,由于其电容加载路径非常小,所以可以在所选字线处快速创建精确的电压。
    • 10. 发明授权
    • EEPROM decoder block having a p-well coupled to a charge pump for
charging the p-well and method of programming with the EEPROM decoder
block
    • EEPROM解码器块具有耦合到用于对p阱充电的电荷泵的p阱以及用EEPROM解码器块进行编程的方法
    • US6081455A
    • 2000-06-27
    • US232023
    • 1999-01-14
    • Binh Q. LePau-ling ChenShane C. Hollmer
    • Binh Q. LePau-ling ChenShane C. Hollmer
    • G11C8/12G11C16/08G11C16/12G11C16/00
    • G11C8/12G11C16/08G11C16/12
    • A block decoder includes a p-well. A low voltage source is coupled to the p-well for asserting a body bias voltage to the p-well. An n-type word line pass transistor is positioned within the p-well and is coupled to a word line for passing programming voltages to the word line. A high voltage source is coupled to pass circuitry configured to assert a voltage on a gate of the pass transistor. The low voltage source is configured to apply a voltage of approximately 10 volts or more to the p-well during programming, thus reducing the voltage between the source and body region (and thus the threshold voltage as well) of NMOS transistors disposed within the p-well. Therefore, the amount of voltage needed to be applied to the pass transistors is reduced. Furthermore, the pass circuitry can work for lower supply voltages since the supply voltage is limited by the threshold voltage of the n-type transistors within the p-well.
    • 块解码器包括p阱。 低电压源耦合到p阱,用于断定对p阱的体偏置电压。 n型字线传输晶体管位于p阱内并耦合到字线,用于将编程电压传递到字线。 耦合高电压源以通过配置成断定传输晶体管的栅极上的电压的电路。 低电压源被配置为在编程期间向p阱施加大约10伏特或更高的电压,从而降低位于p内的NMOS晶体管的源极和体区之间的电压(以及阈值电压) -好。 因此,需要施加到传输晶体管的电压量减小。 此外,通过电路可以用于较低的电源电压,因为电源电压受p阱内n型晶体管的阈值电压的限制。