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    • 12. 发明授权
    • Read conditions for a non-volatile memory (NVM)
    • 读取非易失性存储器(NVM)的条件
    • US08310877B2
    • 2012-11-13
    • US12985724
    • 2011-01-06
    • Jeffrey C. CunninghamThomas D. CookStephen F. McGintyRonald J. Syzdek
    • Jeffrey C. CunninghamThomas D. CookStephen F. McGintyRonald J. Syzdek
    • G11C16/04
    • G11C16/28G11C11/14G11C11/5642G11C16/10G11C16/3418
    • A method and memory are provided for determining a read reference level for a plurality of non-volatile memory cells. The method includes: performing a program operation of the plurality of non-volatile memory cells; determining a program level of a least programmed memory cell of the plurality of memory cells; performing an erase operation of the plurality of non-volatile memory cells; determining an erase level of a least erased memory cell of the plurality of memory cells; determining an operating window between the program level and the erase level; and setting the read reference level to be a predetermined offset from the erase level if the operating window is determined to compare favorably to a predetermined value. The memory includes registers for storing the program level and the erase level.
    • 提供了一种用于确定多个非易失性存储器单元的读取参考电平的方法和存储器。 该方法包括:执行多个非易失性存储单元的编程操作; 确定所述多个存储器单元中的最小程序存储单元的程序级; 执行所述多个非易失性存储单元的擦除操作; 确定所述多个存储器单元中最少擦除的存储单元的擦除电平; 确定程序级和擦除级之间的操作窗口; 并且如果确定操作窗口与预定值相比较,则将读取参考电平设置为与擦除电平的预定偏移。 存储器包括用于存储程序电平和擦除电平的寄存器。
    • 13. 发明申请
    • REFRESH OPERATION DURING LOW POWER MODE CONFIGURATION
    • 低功耗模式配置时的刷新操作
    • US20110316592A1
    • 2011-12-29
    • US12823487
    • 2010-06-25
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • H03L7/00
    • G06F1/3206G06F1/3275G11C5/148G11C16/30Y02D10/14
    • A target circuit of an electronic device is placed in a suspended mode by disconnecting the target circuit from one or more voltage sources. A refresh controller periodically initiates a refresh operation during the suspended mode by temporarily reconnecting the target circuit to the one or more voltage sources for a duration sufficient to recharge capacitances of the target circuit. The refresh controller terminates the refresh operation by disconnecting the target circuit from the one or more voltage sources, thereby continuing the suspended mode of the electronic device. The refresh controller can employ a Very Low Frequency Oscillator (VLFO) to time the frequency of refresh operations. The VLFO manages the refresh initialization timing based on the voltage across a capacitor that is selectively charged or discharged so as to implement the refresh operation. The refresh controller further can employ a counter to time the duration of the refresh operation.
    • 通过将目标电路与一个或多个电压源断开而将电子设备的目标电路置于暂停模式。 刷新控制器在暂停模式期间周期性地启动刷新操作,通过将目标电路临时重新连接到一个或多个电压源,持续时间足以再充电目标电路的电容。 刷新控制器通过将目标电路与一个或多个电压源断开而终止刷新操作,由此继续电子设备的挂起模式。 刷新控制器可以使用超低频振荡器(VLFO)来计时刷新操作的频率。 VLFO基于选择性地充电或放电的电容器上的电压来管理刷新初始化时序,以便实现刷新操作。 刷新控制器还可以使用计数器来刷新操作的持续时间。
    • 14. 发明授权
    • Charge pump for use with a synchronous load
    • 充电泵用于同步负载
    • US08040700B2
    • 2011-10-18
    • US12619303
    • 2009-11-16
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • H02M3/18
    • H02M3/07
    • A charge pump has circuitry and implements a method for monitoring a synchronous load by using a first voltage threshold below a target output voltage and a second voltage threshold above a target output voltage. An output terminal is coupled to the load. Charge is demanded by clocking the load. When the target output voltage passes below the first voltage threshold, a first value representing a present size of a charging capacitance is stored as a stored first value, and a second stored value representing a needed changed size of the charging capacitance is used. The present size of the charging capacitance is changed in response to the passing of the target output voltage below the first voltage threshold. When demand for charge from the load is reduced, a present value is saved and a prior value is restored to change the size of the charging capacitance.
    • 电荷泵具有电路并且实现了通过使用低于目标输出电压的第一电压阈值和高于目标输出电压的第二电压阈值来监视同步负载的方法。 输出端子耦合到负载。 通过计时负载需要充电。 当目标输出电压通过低于第一电压阈值时,表示充电电容的当前尺寸的第一值被存储为存储的第一值,并且使用表示充电电容所需改变的尺寸的第二存储值。 响应于目标输出电压的通过低于第一电压阈值,充电电容的当前尺寸被改变。 当减少对负载的充电需求时,保存当前值并恢复先前值以改变充电电容的尺寸。
    • 15. 发明授权
    • Charge pump with charge feedback and method of operation
    • 充电泵具有充电反馈和操作方法
    • US07948301B2
    • 2011-05-24
    • US12549499
    • 2009-08-28
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • G05F1/10
    • H02M3/07H02M2003/077
    • A charge pump charges a first capacitor to a predetermined input voltage using a first switch. The first switch is coupled to a first terminal of the first capacitor for coupling the first terminal to an input terminal that receives the predetermined input voltage. A second switch couples a second terminal of the first capacitor to a reference voltage terminal. Charge is sequentially transferred from the first capacitor to an output capacitance by using the first switch. A portion of charge is sequentially removed from the output capacitance to the input terminal using a third switch and a second capacitor. Configuration logic provides control signals to make one or more of a plurality of charge transfer capacitors switch the same as said first capacitor switches.
    • 电荷泵使用第一开关将第一电容器充电至预定的输入电压。 第一开关耦合到第一电容器的第一端子,用于将第一端子耦合到接收预定输入电压的输入端子。 第二开关将第一电容器的第二端子耦合到参考电压端子。 通过使用第一开关将充电从第一电容器依次传送到输出电容。 使用第三开关和第二电容器将一部分电荷从输出电容顺序地移除到输入端。 配置逻辑提供控制信号以使得多个电荷转移电容器中的一个或多个与所述第一电容器开关相同。
    • 16. 发明申请
    • CHARGE PUMP FOR USE WITH A SYNCHRONOUS LOAD
    • 充电泵与同步负载一起使用
    • US20110115549A1
    • 2011-05-19
    • US12619303
    • 2009-11-16
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • Thomas D. CookJeffrey C. CunninghamKarthik Ramanan
    • G05F1/10
    • H02M3/07
    • A charge pump has circuitry and implements a method for monitoring a synchronous load by using a first voltage threshold below a target output voltage and a second voltage threshold above a target output voltage. An output terminal is coupled to the load. Charge is demanded by clocking the load. When the target output voltage passes below the first voltage threshold, a first value representing a present size of a charging capacitance is stored as a stored first value, and a second stored value representing a needed changed size of the charging capacitance is used. The present size of the charging capacitance is changed in response to the passing of the target output voltage below the first voltage threshold. When demand for charge from the load is reduced, a present value is saved and a prior value is restored to change the size of the charging capacitance.
    • 电荷泵具有电路并且实现了通过使用低于目标输出电压的第一电压阈值和高于目标输出电压的第二电压阈值来监视同步负载的方法。 输出端子耦合到负载。 通过计时负载需要充电。 当目标输出电压通过低于第一电压阈值时,表示充电电容的当前尺寸的第一值被存储为存储的第一值,并且使用表示充电电容所需改变的尺寸的第二存储值。 响应于目标输出电压的通过低于第一电压阈值,充电电容的当前尺寸被改变。 当减少对负载的充电需求时,保存当前值并恢复先前值以改变充电电容的尺寸。
    • 17. 发明授权
    • Level shifter
    • 电平移位器
    • US07560970B2
    • 2009-07-14
    • US11835552
    • 2007-08-08
    • Thomas D. CookTahmina AkhterJeffrey C. Cunningham
    • Thomas D. CookTahmina AkhterJeffrey C. Cunningham
    • H03L5/00
    • H03K3/35613
    • A level converter comprises first and second latches, and first through fourth transistors. The first latch has first and second power supply terminals, and first and second nodes. The second latch has third and fourth power supply terminals, and third and fourth nodes. The first transistor has a first current electrode coupled to the first node, a control electrode coupled to receive a first bias voltage, and a second current electrode. The second transistor has a first current electrode coupled to the second current electrode of the first transistor, a second current electrode coupled to the third node, and a control electrode coupled to receive a second bias voltage. The third transistor has a first current electrode coupled to the second node, a control electrode coupled to receive the first bias voltage, and a second current electrode. The fourth transistor has a first current electrode coupled to the second current electrode of the third transistor, a control electrode coupled to receive the second bias voltage, and a second current electrode coupled to the fourth node.
    • 电平转换器包括第一和第二锁存器以及第一至第四晶体管。 第一锁存器具有第一和第二电源端子以及第一和第二节点。 第二锁存器具有第三和第四电源端子,以及第三和第四节点。 第一晶体管具有耦合到第一节点的第一电流电极,耦合以接收第一偏置电压的控制电极和第二电流电极。 第二晶体管具有耦合到第一晶体管的第二电流电极的第一电流电极,耦合到第三节点的第二电流电极和耦合以接收第二偏置电压的控制电极。 第三晶体管具有耦合到第二节点的第一电流电极,耦合以接收第一偏置电压的控制电极和第二电流电极。 第四晶体管具有耦合到第三晶体管的第二电流电极的第一电流电极,耦合以接收第二偏置电压的控制电极和耦合到第四节点的第二电流电极。