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1. 发明授权

US6064340A Electrostatic discharge locating apparatus and method 失效
标题翻译：静电放电定位装置及方法
公开(公告)号：US6064340A
公开(公告)日：2000-05-16
申请号：US108963
申请日：1998-07-02
申请人： Gregg D. Croft , Joseph C. Bernier , Rex Lowther
发明人： Gregg D. Croft , Joseph C. Bernier , Rex Lowther
IPC分类号： G01S5/00 , G01S5/06 , G01S3/02 , G01S31/02
CPC分类号： G01S5/06 , G01R29/0814 , G01R31/001 , G01S5/0009
摘要： An electrostatic discharge locating system may include a plurality of receivers and a central unit. Each receiver may include an antenna. The receivers may receive radio wave signals emanating from an electrostatic discharge event and transmit the signals to the central unit for processing. The central unit may determine the location of an electrostatic discharge event from the relative time of signal reception or the signal amplitudes along with predetermined locations of the receivers.
摘要翻译：静电放电定位系统可以包括多个接收器和中央单元。每个接收机可以包括天线。接收机可以接收从静电放电事件发出的无线电波信号，并将信号发送到中央单元进行处理。中央单元可以从信号接收的相对时间或信号幅度以及接收器的预定位置确定静电放电事件的位置。

2. 发明授权

US5574618A ESD protection using SCR clamping 失效
标题翻译：使用SCR夹紧的ESD保护
公开(公告)号：US5574618A
公开(公告)日：1996-11-12
申请号：US198002
申请日：1994-02-17
申请人： Gregg D. Croft
发明人： Gregg D. Croft
IPC分类号： H01L27/02 , H02H9/04 , H05F3/00 , H02H3/20
CPC分类号： H01L27/0262 , H01L27/0251 , H02H9/045 , H02H9/046
摘要： An SCR clamp provides a low impedance discharge path for static charges across on IC's pins. The SCR clamp cathode, cathode, gate anode, and anode gate float when the protected IC is disconnected from its associated circuit elements. Under this condition, the SCR clamp can be turned on at the low Vh and Ih levels of the SCR, allowing the clamp to operate to discharge static electricity at the low voltage determined by SCR junction biases.
摘要翻译： SCR钳位为IC引脚上的静电荷提供低阻抗放电路径。当受保护的IC与其相关联的电路元件断开连接时，SCR钳位阴极，阴极，栅极阳极和阳极栅极浮动。在这种情况下，SCR钳位可以在SCR的低Vh和Ih电平下导通，允许钳位器以由SCR结偏置确定的低电压放电静电。

3. 发明申请

US20110096446A1 ELECTROSTATIC DISCHARGE CLAMP WITH CONTROLLED HYSTERESIS INCLUDING SELECTABLE TURN ON AND TURN OFF THRESHOLD VOLTAGES 审中-公开
标题翻译：具有可控选择开启和关闭阈值电压的控制滞后的静电放电钳
公开(公告)号：US20110096446A1
公开(公告)日：2011-04-28
申请号：US12721172
申请日：2010-03-10
申请人： Gregg D. Croft
发明人： Gregg D. Croft
IPC分类号： H02H9/04
CPC分类号： H02H9/044 , H01L27/0251 , H01L2924/0002 , H05K3/32 , Y10T29/49117 , H01L2924/00
摘要： A electrostatic discharge (ESD) clamp for coupling between first and second nodes for providing ESD protection including a clamp circuit and first and second voltage threshold circuits. The clamp circuit limits operating voltage between the first and second nodes to a maximum level when activated. The first and second voltage threshold circuits each have a selectable threshold voltage, such as by coupling one or more voltage threshold devices in series. The first voltage threshold circuit triggers to turn on the clamp circuit when the operating voltage increases above a first voltage threshold. The second voltage threshold circuit triggers when the clamp circuit is turned on and is turned off to turn off the clamp circuit when the operating voltage decreases to the second threshold voltage. The second threshold voltage may be selected at any level above the nominal operating voltage to prevent the clamp from latching.
摘要翻译：用于在第一和第二节点之间耦合以提供ESD保护的静电放电（ESD）钳位，包括钳位电路和第一和第二电压阈值电路。钳位电路将第一和第二节点之间的工作电压限制为最大电平。第一和第二电压阈值电路各自具有可选择的阈值电压，例如通过串联耦合一个或多个电压阈值器件。当工作电压增加到高于第一电压阈值时，第一电压阈值电路触发钳位电路接通。当钳位电路导通时，第二电压阈值电路触发并且当工作电压降低到第二阈值电压时被关断以关断钳位电路。可以在高于额定工作电压的任何电平上选择第二阈值电压，以防止钳位锁定。

4. 发明授权

US5359211A High voltage protection using SCRs 失效
标题翻译：使用SCR的高压保护
公开(公告)号：US5359211A
公开(公告)日：1994-10-25
申请号：US732475
申请日：1991-07-18
申请人： Gregg D. Croft
发明人： Gregg D. Croft
IPC分类号： H01L27/02 , H01L29/74 , H01L29/06 , H01L29/78
CPC分类号： H01L27/0259 , H01L27/0251 , H01L2224/49171 , H01L2924/01014 , H01L2924/12032 , H01L2924/13034 , H01L2924/1305 , H01L2924/13091 , H01L2924/19041 , H01L2924/30107 , H01L2924/3011
摘要： A high voltage protection circuit includes a breakdown network for providing a discharge path between a pair of terminal of a circuit to be protected. Each network conducts current between a supply terminal and another terminal at a low threshold voltage value when power is removed from the supply terminal. The network increases the threshold value when power is applied to the supply terminal to prevent conduction through the breakdown network during normal operation of the circuit to be protected. In one implementation, the protection circuit includes anti-latching circuitry connected to the breakdown network for preventing the breakdown network from latching on after or during the time power is applied to the supply terminals. To minimize the degradation of DC operating characteristics, the leakage currents, due to the protection circuit, between the first terminal and the positive supply terminal, and between the first terminal and the negative supply terminal cancel each other. The protection circuit may be incorporated on the same substrate as the circuit to be protected or it may be incorporated on a separate substrate sharing a common housing with the circuit to be protected. Alternately, the protection circuit may be in its own housing with its external leads connected to the leads of a first housing including the circuit to be protected.
摘要翻译：高压保护电路包括用于在要保护的电路的一对端子之间提供放电路径的击穿网络。当电源从供电端子移除时，每个网络以低阈值电压值在电源端子和另一个端子之间传导电流。当电源施加到供电端子时，网络增加阈值，以防止在要保护的电路的正常工作期间通过击穿网络导通。在一个实施方式中，保护电路包括连接到击穿网络的防闩锁电路，用于防止击穿网络在向电源端子施加电力之后或期间锁定。为了最小化直流工作特性的劣化，由于第一端子和正电源端子之间以及第一端子和负电源端子之间的保护电路引起的漏电流彼此抵消。保护电路可以被结合在与要保护的电路相同的衬底上，或者它可以被结合在与要保护的电路共享共同壳体的单独衬底上。或者，保护电路可以在其自己的壳体中，其外部引线连接到包括要保护的电路的第一壳体的引线。

5. 发明授权

US07110933B2 Line modeling tool 失效
标题翻译：线建模工具
公开(公告)号：US07110933B2
公开(公告)日：2006-09-19
申请号：US10628195
申请日：2003-07-28
申请人： Rex E. Lowther , Gregg D. Croft , Yiqun Lin , Robert Lomenic , James P. Furino, Jr. , Joseph A. Czagas
发明人： Rex E. Lowther , Gregg D. Croft , Yiqun Lin , Robert Lomenic , James P. Furino, Jr. , Joseph A. Czagas
IPC分类号： G06F17/50
CPC分类号： G06F17/5036
摘要： A method of a modeling metallization parasitics with the use of a simulation program. In one embodiment, a method of simulating interconnect lines in an electronic design automation simulation is disclosed. The method comprises partitioning the interconnect lines into groups of interconnect lines. Each group of interconnect lines does not have interactions with any of the other groups of interconnect lines. Moreover, at least one of the groups of interconnect lines contains at least three interconnect lines. The interconnect lines in each group are modeled. The modeling includes at least one of modeling mutual inductances and modeling of mutual capacitances.
摘要翻译：使用仿真程序建模金属化寄生效应的方法。在一个实施例中，公开了一种在电子设计自动化仿真中模拟互连线的方法。该方法包括将互连线划分成互连线组。每组互连线不与任何其他互连线组相互作用。此外，互连线组中的至少一个包含至少三条互连线。每组中的互连线被建模。该建模包括至少一个模拟互感和互电容建模。

6. 发明授权

US06924963B2 ESD protection network utilizing precharge bus lines 失效
标题翻译：使用预充电总线的ESD保护网络
公开(公告)号：US06924963B2
公开(公告)日：2005-08-02
申请号：US10076716
申请日：2002-02-14
申请人： William R. Young , Gregg D. Croft
发明人： William R. Young , Gregg D. Croft
IPC分类号： H01H1/00 , H01L27/02 , H02H3/22
CPC分类号： H01L27/0292 , H01L27/0251
摘要： An electrostatic discharge protection circuit for an integrated circuit that reduces unwanted transient currents during normal operations. In one embodiment, the electrostatic discharge protection circuit includes one or more electrostatic bus lines, a plurality of signal bonding pads and charge pumps. The one or more electrostatic bus lines are used to direct electrostatic discharge around internal circuitry. The plurality of signal bonding pads are used to receive external voltage signals. Each signal bonding pad is coupled to an associated electrostatic bus line via an unidirectional conducting device. A charge pump is used on each electrostatic bus line to precharge its associated electrostatic bus line to an associated predetermined voltage level. The precharging of each electrostatic bus line to its predetermined voltage level reduces transient currents through the unidirectional conducting devices when external voltage signals having voltage levels beyond normal supply voltage ranges are applied to the signal bonding pads.
摘要翻译：用于集成电路的静电放电保护电路，其在正常操作期间减少不期望的瞬态电流。在一个实施例中，静电放电保护电路包括一个或多个静电总线，多个信号焊盘和电荷泵。一个或多个静电总线用于引导围绕内部电路的静电放电。多个信号接合焊盘用于接收外部电压信号。每个信号焊盘通过单向导电装置耦合到相关联的静电总线。在每个静电总线上使用电荷泵，以将其相关联的静电总线预充电至相关的预定电压电平。当具有超过正常电源电压范围的电压电平的外部电压信号被施加到信号接合焊盘时，每个静电总线线路预充电到其预定的电压电平减小了通过单向导电器件的瞬态电流。

7. 发明授权

US5978192A Schmitt trigger-configured ESD protection circuit 失效
标题翻译：施密特触发器配置的ESD保护电路
公开(公告)号：US5978192A
公开(公告)日：1999-11-02
申请号：US964672
申请日：1997-11-05
申请人： William R. Young , Gregg D. Croft
发明人： William R. Young , Gregg D. Croft
IPC分类号： H02H3/20 , H02H3/06 , H02H9/00 , H02H9/04
CPC分类号： H02H9/046 , H02H9/004
摘要： A Schmitt trigger-configured overvoltage protection circuit has a hysteresis turn-on, turn-off characteristic that minimizes its sensitivity to noise, and is effective to protect an integrated circuit against a DC overvoltage condition, and electrostatic discharge-based transients, while allowing `hot` insertion of a device containing the clamping circuit into an already powered-up system. The protection circuit employs a reference device, such as a Zener diode, that enables the clamping circuit trigger threshold to be set at a value that is independent of the power supply voltage.
摘要翻译：施密特触发器配置的过电压保护电路具有滞后导通，关断特性，使其对噪声的灵敏度最小化，并有效保护集成电路免受直流过电压状态和基于静电放电的瞬变，同时允许“ 将包含钳位电路的装置热插入已经通电的系统中。保护电路使用诸如齐纳二极管的参考装置，其使得钳位电路触发阈值被设置为与电源电压无关的值。

8. 发明授权

US5546038A SCR inductor transient clamp 失效
标题翻译： SCR电感瞬态钳
公开(公告)号：US5546038A
公开(公告)日：1996-08-13
申请号：US497124
申请日：1995-06-30
申请人： Gregg D. Croft
发明人： Gregg D. Croft
IPC分类号： H03K5/08
CPC分类号： H03K5/08
摘要： A monolithic voltage clamp provides low impedance, low voltage electrostatic discharge protection for an integrated circuit without affecting the integrated circuit's DC characteristics. First, second, third, and fourth regions of semiconducting material are formed with p-n junctions between each region. A first inductor electrically connects the first and second regions, and a second inductor electrically connects the third and fourth regions. The first and second inductors should each have an inductance which is large enough to delay an increase in bypass current around their respective p-n junctions for a period which is long enough to assure that conduction is sufficient to discharge an electrostatic pulse. In a preferred embodiment, first and second reverse bias diodes are used to electrically connect the invention to one or more input/output nodes. In another embodiment, an integrated circuit having first and second potential inputs, and a plurality of input/output nodes, may be provided with a transient clamp according to the invention. Along with the first and second reverse bias diodes used to connect the invention to one or more input/output nodes, third, fourth, fifth, and sixth reverse bias diodes may be used to electrically connect the first and second potential inputs to respective first and fourth semiconducting regions. In this configuration, an input/output node can operate at voltages above and below supply voltages provided to the first and second potential inputs, limited only by the breakdown voltages of the third and fourth reverse bias diodes.
摘要翻译：单片电压钳为集成电路提供低阻抗，低电压静电放电保护，而不会影响集成电路的直流特性。半导体材料的第一，第二，第三和第四区域在每个区域之间形成有p-n结。第一电感器电连接第一和第二区域，并且第二电感器电连接第三和第四区域。第一和第二电感器应当具有足够大的电感，以便延迟围绕它们各自的p-n结的旁路电流的增加一段足以确保导通足以释放静电脉冲的时间段。在优选实施例中，使用第一和第二反向偏置二极管将本发明电连接到一个或多个输入/输出节点。在另一个实施例中，具有第一和第二电位输入的集成电路以及多个输入/输出节点可以具有根据本发明的瞬态钳位。随着用于将本发明连接到一个或多个输入/输出节点的第一和第二反向偏置二极管，可以使用第三，第四，第五和第六反向偏置二极管将第一和第二电位输入电连接到相应的第一和第二反向偏置二极管第四个半导体区域。在该配置中，输入/输出节点可以在高于和低于提供给第一和第二电位输入的电源电压的电压下工作，仅受第三和第四反向偏置二极管的击穿电压的限制。

9. 发明授权

US06522117B1 Reference current/voltage generator having reduced sensitivity to variations in power supply voltage and temperature 失效
标题翻译：参考电流/电压发生器对电源电压和温度的变化具有降低的灵敏度
公开(公告)号：US06522117B1
公开(公告)日：2003-02-18
申请号：US09880726
申请日：2001-06-13
申请人： William R. Young , Gregg D. Croft
发明人： William R. Young , Gregg D. Croft
IPC分类号： G05F316
CPC分类号： G05F3/267 , Y10S323/907
摘要： A reference current/voltage gnereator is insensitive to variations in power supply voltage and temperature. The operational parameters of matched current mirror transistors of the generator are effectively equalized by an auxiliary bias amplifier, whose transistors are matched with and connected to the current mirror transistors of the generator in such a manner as to maintain the same electrical parameters in each of the current mirror legs of the current generator, irrespective of variations in supply voltage. Temperature insensitivity is achieved by making the output current mirror a current that is the sum of two currents whose current paths complementary temperature coefficients.
摘要翻译：参考电流/电压发生器对电源电压和温度的变化不敏感。发电机的匹配电流镜晶体管的工作参数通过辅助偏置放大器有效地相等，其辅助偏置放大器的晶体管与发生器的电流镜像晶体管相匹配并连接到发生器的电流镜像晶体管，电流发生器的电流镜腿，与电源电压的变化无关。通过使输出电流镜为电流为互补温度系数的两个电流的和的电流来实现温度不敏感。

10. 发明授权

US5708549A Integrated circuit having enhanced transient voltage protection and associated methods 失效
标题翻译：具有增强的瞬态电压保护和相关方法的集成电路
公开(公告)号：US5708549A
公开(公告)日：1998-01-13
申请号：US726183
申请日：1996-10-04
申请人： Gregg D. Croft
发明人： Gregg D. Croft
IPC分类号： H02H9/04 , H02H3/22
CPC分类号： H02H9/046
摘要： An integrated circuit includes protected circuit portions for being electrically connected to an electronic circuit via electrical conductors, and a multiple time constant transient clamping circuit for clamping a transient voltage based upon one of first and second time constants. The first time constant is preferably selected when the integrated circuit is electrically connected to the electronic circuit and is preferably relatively short to permit operation and while protecting the IC from a transient voltage, such as an electrostatic discharge (ESD) event. The longer second time constant is preferably selected when the IC is removed or not electrically connected to the electronic circuit. The longer second time constant is preferably sufficiently long to protect the IC from a transient voltage when the IC is not electrically connected to the circuit board. The multiple time constant transient clamping circuit may include a first active voltage clamp and a first clamp controller, and a second active voltage clamp and second clamp controller. A time constant selecting device having a fixed impedance, such as a resistor or conductive trace, for example, may be electrically connected between two electrical conductors. Method aspects of the invention are also disclosed.
摘要翻译：集成电路包括用于经由电导体电连接到电子电路的保护电路部分，以及用于基于第一和第二时间常数中的一个钳位瞬时电压的多时间恒定瞬态钳位电路。当集成电路电连接到电子电路时，优选地选择第一时间常数，并且优选地相对较短以允许操作并且同时保护IC免受例如静电放电（ESD）事件的瞬态电压的影响。当IC被去除或不电连接到电子电路时，优选选择较长的第二时间常数。较长的第二时间常数优选足够长以在IC不电连接到电路板时保护IC免受瞬态电压的影响。多时间常数瞬态钳位电路可以包括第一有源电压钳位器和第一钳位控制器，以及第二有源电压钳位器和第二钳位控制器。例如，具有固定阻抗的时间常数选择装置，例如电阻器或导电迹线可以电连接在两个电导体之间。还公开了本发明的方法方面。

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