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    • 1. 发明授权
    • Apparatus and method for margin testing single polysilicon EEPROM cells
    • 单个多晶硅EEPROM单元的边缘测试的装置和方法
    • US06646919B1
    • 2003-11-11
    • US09874716
    • 2001-06-04
    • Raminda U. MaduraweMyron W. WongJohn C. CostelloJames D. SansburyBruce F. Mielke
    • Raminda U. MaduraweMyron W. WongJohn C. CostelloJames D. SansburyBruce F. Mielke
    • G11C1606
    • H01L27/11521G11C16/04G11C16/0441G11C16/26G11C16/3427G11C29/50G11C29/50004G11C2216/10H01L27/115H01L27/11558
    • Disclosed is a method and apparatus for evaluating margin voltages in single poly EEPROM cells. Briefly, the invention involves shifting the cell's threshold voltage higher, resulting in a corresponding rise in the margin voltage, so that testing for the erase margin may be conducted in the positive voltage range. The present invention implements a variety of solutions to the problem, including both innovations in cell processing and circuitry. In one embodiment, the process steps employed to create the floating gate transistor are changed in order to increase its threshold voltage. Alternatively, or in combination with these general process changes, the width of the floating gate transistor may be reduced, resulting in a corresponding increase in the margin voltage. Circuit modifications include providing a separate test mode condition where the sense amp trip current is higher than under normal operation, and raising the source line's voltage level with a new sense amp optimization, or only during the margin testing mode, both of which shift the erase margin voltages for the cell into the testable range.
    • 公开了一种用于评估单个多层EEPROM单元中的边缘电压的方法和装置。 简而言之,本发明涉及将电池的阈值电压更高,导致余量电压的相应上升,从而可以在正电压范围内进行擦除裕度的测试。 本发明实现了针对该问题的各种解决方案,包括在小区处理和电路中的创新。 在一个实施例中,用于产生浮栅晶体管的工艺步骤被改变以增加其阈值电压。 或者,或者与这些一般的工艺变化相结合,浮栅晶体管的宽度可能会减小,导致余量电压的相应增加。 电路修改包括提供单独的测试模式条件,其中感测放大器跳闸电流高于正常操作,并且通过新的感测放大器优化提高源极线路的电压电平,或者仅在裕度测试模式期间,两者都移动擦除 电池的裕度电压进入可测量范围。
    • 3. 发明授权
    • Apparatus and method for margin testing single polysilicon EEPROM cells
    • 单个多晶硅EEPROM单元的边缘测试的装置和方法
    • US06781883B1
    • 2004-08-24
    • US10620917
    • 2003-07-15
    • Raminda U. MaduraweMyron W. WongJohn C. CostelloJames D. SansburyBruce E. Mielk
    • Raminda U. MaduraweMyron W. WongJohn C. CostelloJames D. SansburyBruce E. Mielk
    • G11C1606
    • H01L27/11521G11C16/04G11C16/0441G11C16/26G11C16/3427G11C29/50G11C29/50004G11C2216/10H01L27/115H01L27/11558
    • Disclosed is a method and apparatus for evaluating margin voltages in single poly EEPROM cells. Briefly, the invention involves shifting the cell's threshold voltage higher, resulting in a corresponding rise in the margin voltage, so that testing for the erase margin may be conducted in the positive voltage range. The present invention implements a variety of solutions to the problem, including both innovations in cell processing and circuitry. In one embodiment, the process steps employed to create the floating gate transistor are changed in order to increase its threshold voltage. Alternatively, or in combination with these general process changes, the width of the floating gate transistor may be reduced, resulting in a corresponding increase in the margin voltage. Circuit modifications include providing a separate test mode condition where the sense amp trip current is higher than under normal operation, and raising the source line's voltage level with a new sense amp optimization, or only during the margin testing mode, both of which shift the erase margin voltages for the cell into the testable range.
    • 公开了一种用于评估单个多层EEPROM单元中的边缘电压的方法和装置。 简而言之,本发明涉及将电池的阈值电压更高,导致余量电压的相应上升,从而可以在正电压范围内进行擦除裕度的测试。 本发明实现了针对该问题的各种解决方案,包括在小区处理和电路中的创新。 在一个实施例中,用于产生浮栅晶体管的工艺步骤被改变以增加其阈值电压。 或者,或者与这些一般的工艺变化相结合,浮栅晶体管的宽度可能会减小,导致余量电压的相应增加。 电路修改包括提供单独的测试模式条件,其中感测放大器跳闸电流高于正常操作,并且通过新的感测放大器优化提高源极线路的电压电平,或者仅在裕度测试模式期间,两者都移动擦除 电池的裕度电压进入可测量范围。
    • 4. 发明授权
    • Apparatus and method for margin testing single polysilicon EEPROM cells
    • 单个多晶硅EEPROM单元的边缘测试的装置和方法
    • US06268623B1
    • 2001-07-31
    • US08995873
    • 1997-12-22
    • Raminda U. MaduraweMyron W. WongJohn C. CostelloJames D. SansburyBruce E. Mielke
    • Raminda U. MaduraweMyron W. WongJohn C. CostelloJames D. SansburyBruce E. Mielke
    • H01L29788
    • H01L27/11521G11C16/04G11C16/0441G11C16/26G11C16/3427G11C29/50G11C29/50004G11C2216/10H01L27/115H01L27/11558
    • Disclosed is a method and apparatus for evaluating margin voltages in single poly EEPROM cells. Briefly, the invention involves shifting the cell's threshold voltage higher, resulting in a corresponding rise in the margin voltage, so that testing for the erase margin may be conducted in the positive voltage range. The present invention implements a variety of solutions to the problem, including both innovations in cell processing and circuitry. In one embodiment, the process steps employed to create the floating gate transistor are changed in order to increase its threshold voltage. Alternatively, or in combination with these general process changes, the width of the floating gate transistor may be reduced, resulting in a corresponding increase in the margin voltage. Circuit modifications include providing a separate test mode condition where the sense amp trip current is higher than under normal operation, and raising the source line's voltage level with a new sense amp optimization, or only during the margin testing mode, both of which shift the erase margin voltages for the cell into the testable range.
    • 公开了一种用于评估单个多层EEPROM单元中的边缘电压的方法和装置。 简而言之,本发明涉及将电池的阈值电压更高,导致余量电压的相应上升,从而可以在正电压范围内进行擦除裕度的测试。 本发明实现了针对该问题的各种解决方案,包括在小区处理和电路中的创新。 在一个实施例中,用于产生浮栅晶体管的工艺步骤被改变以增加其阈值电压。 或者,或者与这些一般的工艺变化相结合,浮栅晶体管的宽度可能会减小,导致余量电压的相应增加。 电路修改包括提供单独的测试模式条件,其中感测放大器跳闸电流高于正常操作,并且通过新的感测放大器优化提高源极线路的电压电平,或者仅在裕度测试模式期间,两者都移动擦除 电池的裕度电压进入可测量范围。
    • 5. 发明授权
    • Sense amplifier with individually optimized high and low power modes
    • 感应放大器,具有单独优化的高功率和低功耗模式
    • US5850365A
    • 1998-12-15
    • US772567
    • 1996-12-24
    • Dirk A. ReeseMyron W. WongJohn C. Costello
    • Dirk A. ReeseMyron W. WongJohn C. Costello
    • G11C7/06G11C7/02
    • G11C7/067
    • The present invention is a sense amplifier circuit for use with programmable logic devices that provides improved switching time by actively limiting the voltage swing on the bit line which it is sensing, rather than passively sensing the voltage, employs feedback circuits to further improve switching time and may be selectively operated in low power mode without significant reduction in switching speed. Voltage reference control circuitry, comprising variable current limiters controlled by the potential of a supply of reference potential, can be added to improve noise immunity. The circuitry of the supply of reference potential is designed so that its sensitivity to fabrication variations is substantially similar to that of the sense amplifier and so that it adjusts the reference potential accordingly.
    • 本发明是一种与可编程逻辑器件一起使用的读出放大器电路,通过主动地限制其正在感测的位线上的电压摆幅而不是被动地感测电压来提供改进的开关时间,采用反馈电路来进一步提高开关时间, 可以选择性地在低功率模式下操作而不显着降低开关速度。 可以添加包括由参考电位供应的电位控制的可变电流限制器的电压参​​考控制电路,以提高抗噪声性能。 设计参考电位的电路被设计成使得其对制造变化的敏感度基本上类似于读出放大器的灵敏度,并因此相应地调整参考电位。
    • 6. 发明授权
    • Method and circuit for reducing output ground and power bounce noise
    • 减少输出接地和电源反弹噪声的方法和电路
    • US06184703B2
    • 2001-02-06
    • US09092240
    • 1998-06-05
    • William B. VestDirk A. ReeseMyron W. WongJohn C. Costello
    • William B. VestDirk A. ReeseMyron W. WongJohn C. Costello
    • H03K1716
    • H03K19/00361
    • An output buffer comprising control circuit for reducing the amount of ground and/or power bounce noise. The output buffer further includes one or more driver devices. The output current of the driver device(s) is limited by providing an intermediate drive voltage to the control electrode of the driver device. A pass device (or a transmission gate) provides the intermediate drive voltage and also operates as a variable resistive device that limits the slew rate of the drive voltage. The operation of the pass device can be dependent on a signal level at the output of the output buffer. When the output has transitioned to a new logic state, the new logic level is fed back to change the operating state of the pass device, thus ensuring that the output voltage meets the output VOL and VOH specifications.
    • 一种输出缓冲器,包括用于减少接地和/或功率反弹噪声量的控制电路。 输出缓冲器还包括一个或多个驱动器装置。 通过向驱动器装置的控制电极提供中间驱动电压来限制驱动器装置的输出电流。 通过装置(或传输门)提供中间驱动电压,并且还用作限制驱动电压的转换速率的可变电阻装置。 通过设备的操作可以取决于输出缓冲器输出端的信号电平。 当输出转换到新的逻辑状态时,反馈新的逻辑电平以改变通过器件的工作状态,从而确保输出电压满足输出VOL和VOH规范。
    • 7. 发明授权
    • Sense amplifier with feedback and stabilization
    • 具有反馈和稳定性的感应放大器
    • US5525917A
    • 1996-06-11
    • US358210
    • 1994-12-16
    • Myron W. WongDirk A. ReeseJohn C. Costello
    • Myron W. WongDirk A. ReeseJohn C. Costello
    • G11C7/06G01R19/00
    • G11C7/067
    • The present invention is a sense amplifier circuit for use with programmable logic devices, that provides improved switching time by actively limiting the voltage swing on the bit line which it is sensing, rather than passively sensing the voltage, and that employs feedback circuits to further improve switching time. Voltage reference control circuitry, comprising variable current limiters controlled by the potential of a supply of reference potential, can be added to improve noise immunity. The circuitry of the supply of reference potential is designed so that its sensitivity to fabrication variations is substantially similar to that of the sense amplifier and so that it adjusts the reference potential accordingly.
    • 本发明是一种与可编程逻辑器件一起使用的读出放大器电路,其通过主动地限制其感测的位线上的电压摆幅来提供改进的开关时间,而不是被动地感测电压,并且采用反馈电路进一步改进 切换时间。 可以添加包括由参考电位供应的电位控制的可变电流限制器的电压参​​考控制电路,以提高抗噪声性能。 设计参考电位的电路被设计成使得其对制造变化的敏感度基本上类似于读出放大器的灵敏度,并因此相应地调整参考电位。