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公开(公告)号：US20110002062A1
公开(公告)日：2011-01-06
申请号：US12829129
申请日：2010-07-01
IPC分类号： G11B5/02
CPC分类号： G11C27/02 , G11B2005/0018 , G11C27/026
摘要： A sample and hold circuit is disclosed that provides longer hold times. An analog multiplexer circuit is also disclosed that exhibits low switch leakage. The analog multiplexer circuit comprises a shared node, a plurality of input circuits, a control input for selecting one or more of the plurality of input circuits, and an amplifier coupled to the shared node. Each input circuit comprises an input node, a primary input switch for selectively coupling an input to the input node, and a secondary input switch for selectively coupling the input node to the shared node, wherein the secondary input switch comprises one or more transistor switches. The parasitic drain and source diodes of one or more transistor switches in secondary input switch in a selected input circuit are coupled to a voltage that is distinct from an input signal of the selected input circuit. For input circuits not selected, the parasitic drain and source diodes of secondary input switch transistor switches are coupled to an output of the amplifier.
摘要翻译： 公开了一种提供较长保持时间的采样和保持电路。 还公开了一种显示低开关泄漏的模拟多路复用器电路。 模拟多路复用器电路包括共享节点，多个输入电路，用于选择多个输入电路中的一个或多个的控制输入以及耦合到共享节点的放大器。 每个输入电路包括输入节点，用于选择性地将输入耦合到输入节点的主输入开关和用于选择性地将输入节点耦合到共享节点的次级输入开关，其中辅助输入开关包括一个或多个晶体管开关。 所选输入电路中的次级输入开关中的一个或多个晶体管开关的寄生漏极和源极二极管被耦合到与选择的输入电路的输入信号不同的电压。 对于未选择的输入电路，次级输入开关晶体管开关的寄生漏极和源极二极管耦合到放大器的输出端。
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公开(公告)号：US07773332B2
公开(公告)日：2010-08-10
申请号：US10719645
申请日：2003-11-21
CPC分类号： G11C27/02
摘要： A sample and hold circuit is disclosed that provides longer hold times. The sample and hold circuit can be used in a disc drive to provide improved read-to-write and write-to-read mode transitions. The sample and hold circuit has an input and an output, and includes at least one capacitive element for retaining a charge. The capacitive element is connected to a node between the input and the output. The sample and hold circuit includes at least one input switch to selectively connect the capacitive element to the input and at least one output switch to selectively connect the capacitive element to the output. In addition, an amplifier is connected to the node and has an offset voltage. In this manner, a voltage drop across at least one of the input and output switches is limited to the offset voltage.
摘要翻译： 公开了一种提供较长保持时间的采样和保持电路。 采样和保持电路可用于磁盘驱动器，以提供改进的读写和写 - 读模式转换。 采样和保持电路具有输入和输出，并且包括用于保持电荷的至少一个电容元件。 电容元件连接到输入和输出之间的节点。 采样和保持电路包括至少一个输入开关，用于选择性地将电容元件连接到输入端和至少一个输出开关，以选择性地将电容元件连接到输出端。 此外，放大器连接到节点并具有偏移电压。 以这种方式，输入和输出开关中的至少一个上的电压降被限制到偏移电压。
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3.发明授权Method and apparatus for storing, accessing, generating and using information about speed limits and speed traps 有权用于存储，访问，生成和使用关于速度限制和速度陷阱的信息的方法和装置公开(公告)号：US06675085B2
公开(公告)日：2004-01-06
申请号：US09932115
申请日：2001-08-16
申请人： Michael P. Straub
发明人： Michael P. Straub
IPC分类号： G06F700
CPC分类号： B60K31/0058 , B60W2050/143 , B60W2550/16 , B60W2550/402
摘要： Methods and apparatus for storing, accessing, generating and using information about speed limits and speed traps are described. The system includes a positional sensor such as a GPS device. Position information is used to access a database of speed limit and/or speed trap information. The database may be local or remote. Access to a remote database may be achieved using a wireless communications device such as a wireless (cellular) modem. Encountered speed traps are logged in response to the activation of a speed trap alert button by a user of the device or the output of a radar/laser detector. Speed trap position, date and time information is transmitted to the remote database system. Speed limit information is used to control the speed of the automobile as part of a cruise control operation and/or is used to provide the motor vehicle operator with warnings, e.g., that the applicable speed limit is being exceeded. Speed trap information which is retrieved using positional information provided by the GPS device is used to warn the user of the device of speed traps in the user's vicinity as the user approaches the location of the known speed trap.
摘要翻译： 描述了存储，访问，生成和使用关于速度限制和速度陷阱的信息的方法和装置。 该系统包括诸如GPS装置的位置传感器。 位置信息用于访问速度限制和/或速度陷阱信息的数据库。 数据库可能是本地的或远程的。 可以使用诸如无线（蜂窝）调制解调器的无线通信设备来实现对远程数据库的访问。 响应于设备的用户或雷达/激光检测器的输出激活速度陷阱警报按钮而记录速度陷阱。 速度陷阱位置，日期和时间信息被传送到远程数据库系统。 速度限制信息用于控制作为巡航控制操作的一部分的汽车的速度和/或用于向机动车辆驾驶员提供警告，例如超过适用的速度限制。 使用由GPS装置提供的位置信息检索到的速度陷阱信息用于在用户接近已知速度陷阱的位置时向用户附近的用户警告设备的速度陷阱。
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公开(公告)号：US07724460B2
公开(公告)日：2010-05-25
申请号：US11034997
申请日：2005-01-13
申请人： David J. Fitzgerald , Jeffrey A. Gleason , James P. Howley , Scott M. O'Brien , Michael P. Straub
发明人： David J. Fitzgerald , Jeffrey A. Gleason , James P. Howley , Scott M. O'Brien , Michael P. Straub
CPC分类号： G11B5/02 , G11B2005/001 , G11B2005/0018
摘要： A recording system employing a magneto-resistive (MR) element senses a resistance value of the MR element and generates one or more MR resistance (MRR) signal values based on the sensed MR element resistance value. The MRR signal values might be, for example, current or voltage values proportional or inversely proportional to the MR element resistance value. The MRR signal values might be employed to control one or more of: i) a unity gain bandwidth of a bias loop for the MR element, ii) an MR read head preamplifier low corner frequency, and iii) a slew rate across the MR element.
摘要翻译： 使用磁阻（MR）元件的记录系统感测MR元件的电阻值，并且基于感测的MR元件电阻值产生一个或多个MR电阻（MRR）信号值。 MRR信号值可以是例如与MR元件电阻值成比例或成反比的电流值或电压值。 可以采用MRR信号值来控制以下各项中的一个或多个：i）用于MR元件的偏置环路的单位增益带宽，ii）MR读取头前置放大器低转角频率，以及iii）横跨MR元件的转换速率 。
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5.发明授权公开(公告)号：US07194079B1
公开(公告)日：2007-03-20
申请号：US09841415
申请日：2001-04-24
申请人： Michael P. Straub , William A. Kay
发明人： Michael P. Straub , William A. Kay
CPC分类号： H04N1/324 , H04M3/56 , H04M7/006 , H04M11/066 , H04M2203/2044 , H04M2207/18 , H04M2242/30 , H04N1/00214 , H04N1/0022 , H04N1/00302 , H04N1/32069 , H04N1/32416 , H04N2201/002 , Y10S379/905
摘要： Improved call forwarding methods and apparatus are described. Dialing of multiple call forwarding locations in parallel is supported. Distinguishing between fax and voice calls and using different forwarding numbers for each type of call is also supported. Forwarding of facsimiles by E-mail as an alternative or in addition to forwarding by phone is also supported. Call forwarding security features such as requiring an answering party to enter a PIN before being connected to the calling party are also described. The call forwarding services can be implemented in the PSTN using AIN techniques avoiding the need to purchase or upgrade customer premise equipment to receive the call forwarding service. Alternatively, the call forwarding methods may be implemented using customer premise equipment such as a PBX.
摘要翻译： 描述了改进的呼叫转移方法和装置。 支持并行拨打多个呼叫转接位置。 还支持区分传真和语音呼叫，并为每种类型的呼叫使用不同的转接号码。 还支持通过电子邮件转发传真机作为替代方式或通过电话转发。 还描述了在连接到主叫方之前要求应答方输入PIN的呼叫转接安全功能。 呼叫转移服务可以使用AIN技术在PSTN中实现，避免购买或升级客户端设备以接收呼叫转移服务。 或者，呼叫转移方法可以使用诸如PBX的客户端设备来实现。
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公开(公告)号：US07630159B2
公开(公告)日：2009-12-08
申请号：US11140262
申请日：2005-05-27
申请人： Scott M. O'Brien , Michael P. Straub , Jeffrey A. Gleason , Shubha Bommalingaiahnapallya , Nameeta Krenz , Arvind Aemireddy
发明人： Scott M. O'Brien , Michael P. Straub , Jeffrey A. Gleason , Shubha Bommalingaiahnapallya , Nameeta Krenz , Arvind Aemireddy
IPC分类号： G11B5/03
CPC分类号： G11B5/012 , G11B5/40 , G11B5/455 , G11B2005/0016 , G11B2005/0018
摘要： An apparatus and method for determining a resistance of a magneto-resistive head. A current drawn by the head, in response to a fixed bias voltage across the head, is converted to a zero temperature coefficient current such that when supplied to a resistor connected to an input terminal of a comparator the effects of variations in the resistance value are avoided. An output signal of the comparator indicates the resistance of the magneto-resistive head.
摘要翻译： 用于确定磁阻头的电阻的装置和方法。 由头部引出的电流，响应于头部上的固定偏置电压而被转换为零温度系数电流，使得当提供给连接到比较器的输入端子的电阻器时，电阻值变化的影响为 避免。 比较器的输出信号表示磁阻头的电阻。
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公开(公告)号：US07119977B2
公开(公告)日：2006-10-10
申请号：US11091352
申请日：2005-03-28
IPC分类号： G11B5/02
CPC分类号： G11B20/10203 , G11B5/012 , G11B5/09 , G11B5/1278 , G11B20/10009 , G11B20/1403 , G11B2005/001
摘要： User data is read from a medium having servo data and user data encoded thereon. The user data is read with a read/write head that is operable in a write mode and a read mode. Servo data is read in a time window following a transition from write mode to read mode, with a frequency passband that has a first low frequency corner. User data is read from the medium after expiration of the time window, with a frequency passband that has a second low frequency corner that is lower than the first low frequency corner.
摘要翻译： 从具有伺服数据和在其上编码的用户数据的介质读取用户数据。 读取/写入头可以在写入模式和读取模式下操作用户数据。 在从写入模式转换到读取模式之后的时间窗口中读取伺服数据，具有第一低频角的频率通带。 用户数据在时间窗口到期后从介质中读取，频率通带具有低于第一低频角的第二低频角。
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8.发明授权Methods and apparatus for storing, accessing, generating and using information about speed limits and speed traps 有权用于存储，访问，生成和使用关于速度限制和速度陷阱的信息的方法和装置公开(公告)号：US06895324B2
公开(公告)日：2005-05-17
申请号：US10691797
申请日：2003-10-23
申请人： Michael P. Straub
发明人： Michael P. Straub
CPC分类号： B60K31/0058 , B60W2050/143 , B60W2550/16 , B60W2550/402
摘要： Methods and apparatus for storing, accessing, generating and using information about speed limits and speed traps are described. The system includes a positional sensor such as a GPS device. Position information is used to access a database of speed limit and/or speed trap information. The database may be local or remote. Access to a remote database may be achieved using a wireless communications device such as a wireless (cellular) modem. Encountered speed traps are logged in response to the activation of a speed trap alert button by a user of the device or the output of a radar/laser detector. Speed trap position, date and time information is transmitted to the remote database system. Speed limit information is used to control the speed of the automobile as part of a cruise control operation and/or is used to provide the motor vehicle operator with warnings, e.g., that the applicable speed limit is being exceeded. Speed trap information which is retrieved using positional information provided by the GPS device is used to warn the user of the device of speed traps in the user's vicinity as the user approaches the location of the known speed trap.
摘要翻译： 描述了存储，访问，生成和使用关于速度限制和速度陷阱的信息的方法和装置。 该系统包括诸如GPS装置的位置传感器。 位置信息用于访问速度限制和/或速度陷阱信息的数据库。 数据库可能是本地的或远程的。 可以使用诸如无线（蜂窝）调制解调器的无线通信设备来实现对远程数据库的访问。 响应于设备的用户或雷达/激光检测器的输出激活速度陷阱警报按钮而记录速度陷阱。 速度陷阱位置，日期和时间信息被传送到远程数据库系统。 速度限制信息用于控制作为巡航控制操作的一部分的汽车的速度和/或用于向机动车辆驾驶员提供警告，例如超过适用的速度限制。 使用由GPS装置提供的位置信息检索到的速度陷阱信息用于在用户接近已知速度陷阱的位置时向用户附近的用户警告设备的速度陷阱。
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公开(公告)号：US06831799B2
公开(公告)日：2004-12-14
申请号：US09725356
申请日：2000-11-29
IPC分类号： G11B502
CPC分类号： H03F3/45089 , G11B5/012 , G11B5/02 , G11B5/09 , G11B2005/0016 , H03F2203/45318 , H03F2203/45394 , H03F2203/45544
摘要： A differential amplifier circuit for amplifying an input signal and for providing an output signal representative of the input signal includes first and second amplifier circuits, and first and second coupling circuits. The first and second amplifier circuits each include first and second transistors, a resistor, and a current generator. The first coupling circuit includes a transistor, a capacitor, and a current generator, and couples a first input signal node to the first transistor of the second amplifier circuit. The second coupling circuit includes a transistor, a capacitor, and a current generator, and couples a second input signal node to the first transistor of the first amplifier circuit.
摘要翻译： 用于放大输入信号并提供表示输入信号的输出信号的差分放大器电路包括第一和第二放大器电路以及第一和第二耦合电路。 第一和第二放大器电路各自包括第一和第二晶体管，电阻器和电流发生器。 第一耦合电路包括晶体管，电容器和电流发生器，并且将第一输入信号节点耦合到第二放大器电路的第一晶体管。 第二耦合电路包括晶体管，电容器和电流发生器，并且将第二输入信号节点耦合到第一放大器电路的第一晶体管。
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公开(公告)号：US06650182B2
公开(公告)日：2003-11-18
申请号：US10016962
申请日：2001-12-14
申请人： Jong K. Kim , Elangovan Nainar , Michael P. Straub
发明人： Jong K. Kim , Elangovan Nainar , Michael P. Straub
IPC分类号： H03F345
CPC分类号： H03F3/45286 , H03F3/3008 , H03F2203/45304 , H03F2203/45496 , H03F2203/45508 , H03F2203/45644 , H03F2203/45718
摘要： A non-linear transconductance amplifier includes a differential input stage and a non-linear transconductance stage operatively coupled to the differential input stage. The differential input stage includes first and second inputs forming a non-inverting input and an inverting input, respectively, of the amplifier for receiving an input differential signal. The non-linear transconductance stage generates an output of the amplifier having a linear transconductance that is substantially zero when the input differential signal is within a predetermined range and a non-linear large transconductance when the input differential signal is outside the predetermined range. The amplifier provides improved response time to widely varying load conditions while possessing a low loop bandwidth. A threshold region where the output of the amplifier is substantially zero can be operatively adjusted and tightly controlled. Furthermore, the amplifier accomplishes these advantages without employing timing circuitry and without the necessary overhead and/or noise often associated with such timing circuitry.
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