公开(公告)号：US20120235670A1

公开(公告)日：2012-09-20

申请号：US13421545

申请日：2012-03-15

申请人： Baris Cagdaser ,  Derek Shaeffer ,  Joe Seeger ,  Chiung C. Lo

发明人： Baris Cagdaser ,  Derek Shaeffer ,  Joe Seeger ,  Chiung C. Lo

IPC分类号： G01R35/00

CPC分类号： G01R33/028

摘要： Described herein are systems, devices, and methods that provide a stable magnetometer. The magnetometer includes a drive element that facilitates flow of a drive current through a node and a sense element operable to detect a magnetic field operating on the drive current. To reduce offset in the detection of the magnetic field, a voltage detector, electrically coupled to the drive element through the node, determines a variation between a node voltage and a target voltage. The voltage detector facilitates suppression of the variation and thereby minimizes the offset in the sense element.

摘要翻译： 这里描述了提供稳定磁力计的系统，装置和方法。 磁力计包括驱动元件，其驱动驱动电流流过节点，感测元件可操作以检测在驱动电流上运行的磁场。 为了减少磁场检测中的偏移，通过节点电耦合到驱动元件的电压检测器确定节点电压和目标电压之间的变化。 电压检测器有助于抑制变化，从而使感测元件中的偏移最小化。

公开(公告)号：US20120176129A1

公开(公告)日：2012-07-12

申请号：US13004383

申请日：2011-01-11

申请人： Joseph SEEGER ,  Chiung C. LO ,  Baris CAGDASER ,  Derek SHAEFFER

发明人： Joseph SEEGER ,  Chiung C. LO ,  Baris CAGDASER ,  Derek SHAEFFER

IPC分类号： G01R33/02

CPC分类号： G01R33/038 ,  G01R33/0286

摘要： A micromachined magnetic field sensor is disclosed. The micromachined magnetic field sensor comprises a substrate; and a drive subsystem partially supported by the substrate with a plurality of beams, and at least one anchor; a mechanism for providing an electrical current through the drive subsystem along a first axis; and Lorentz force acting on the drive subsystem along a second axis in response to a magnetic field vector along a third axis. The micromachined magnetic field sensor also includes a position transducer to detect the motion of the drive subsystem and an electrostatic offset cancellation mechanism coupled to the drive subsystem.

摘要翻译： 公开了一种微加工磁场传感器。 微加工磁场传感器包括基板; 以及驱动子系统，其由具有多个梁的所述衬底部分地支撑，以及至少一个锚; 用于沿着第一轴线提供穿过所述驱动子系统的电流的机构; 以及响应于沿着第三轴的磁场矢量沿第二轴作用在驱动子系统上的洛伦兹力。 微加工磁场传感器还包括位置传感器，用于检测驱动子系统的运动和耦合到驱动子系统的静电偏移消除机构。

公开(公告)号：US20110254760A1

公开(公告)日：2011-10-20

申请号：US12869837

申请日：2010-08-27

申请人： Stephen Lloyd ,  David Sachs ,  David Devries ,  Doug Vargha ,  Derek Shaeffer ,  Erik Anderson ,  Kerry Keal ,  Nathan Royer

发明人： Stephen Lloyd ,  David Sachs ,  David Devries ,  Doug Vargha ,  Derek Shaeffer ,  Erik Anderson ,  Kerry Keal ,  Nathan Royer

IPC分类号： G09G5/00 ,  G06F19/00 ,  G01P15/00

CPC分类号： A63F13/211 ,  A63F13/06 ,  A63F13/235 ,  A63F2300/1006 ,  A63F2300/1031 ,  A63F2300/105 ,  G01P15/00 ,  G06F3/011 ,  G06F3/0346 ,  G06F3/038

摘要： The present invention relates to a combination of a 6-axis motion sensor having a 3-axis gyroscope and a 3-axis linear accelerometer, a motion processor and a radio integrated circuit chip (IC), wherein the intelligence in the motion processor enables the communication between the motion sensor, the radio IC and the external network. The motion processor also enables power savings by adaptively controlling the data rate of the motion sensor, depending on the amount or speed of the motion activity.

摘要翻译： 本发明涉及具有3轴陀螺仪和3轴线性加速度计的6轴运动传感器，运动处理器和无线电集成电路芯片（IC）的组合，其中运动处理器中的智能使得能够 运动传感器，无线电IC和外部网络之间的通信。 运动处理器还通过根据运动活动的量或速度自适应地控制运动传感器的数据速率来实现功率节省。

公开(公告)号：US06963626B1

公开(公告)日：2005-11-08

申请号：US09310598

申请日：1999-05-12

申请人： K. Derek Shaeffer ,  Theresa H. Meng ,  Thomas H. Lee ,  Sydney Reader

发明人： K. Derek Shaeffer ,  Theresa H. Meng ,  Thomas H. Lee ,  Sydney Reader

IPC分类号： H04B1/04 ,  H04B1/10 ,  H04B1/30

CPC分类号： H04B1/0475 ,  H04B1/30

摘要： A communication system uses analog and digital circuits along the same data path in a manner that permits the analog circuitry to avoid adverse affects caused by the digital circuitry. Consistent with one embodiment directed to a signal processing system that detects faint incoming signals, the analog and digital circuits are implemented on a single piece of silicon. In such signal processing systems, noise generated by digital processing blocks can degrade the performance of sensitive analog portions. The effective noise is reduced by causing the analog and digital portions of the system to function during separate time intervals. The noise-generating portions of the system may then be turned off during a first data-communication interval while the analog block operates. The data acquired during this period is stored for subsequent processing by the digital portion during a second shorter data-communication interval. Other aspects are applicable to reception arrangements in which part of the incoming signal may be disregarded without significant degradation in performance of the rest of the system, and other aspects are directed to transmission arrangements in which the inverse of the above reception arrangement is used.

摘要翻译： 通信系统以允许模拟电路避免由数字电路引起的不利影响的方式沿同一数据路径使用模拟和数字电路。 与针对检测微弱输入信号的信号处理系统的一个实施例一致，模拟和数字电路在单片硅片上实现。 在这种信号处理系统中，由数字处理块产生的噪声可能降低敏感模拟部分的性能。 通过使系统的模拟和数字部分在分开的时间间隔内起作用，降低了有效噪声。 然后可以在模拟块操作期间的第一数据通信间隔期间关闭系统的噪声产生部分。 在该时段期间获取的数据被存储用于在第二较短的数据通信间隔期间由数字部分进行后续处理。 其他方面适用于其中输入信号的一部分可以被忽略而不会使系统的其余部分的性能显着降低的接收装置，并且其它方面涉及使用上述接收装置的反向的传输布置。

公开(公告)号：US06700452B1

公开(公告)日：2004-03-02

申请号：US10041234

申请日：2002-01-07

申请人： Derek Shaeffer

发明人： Derek Shaeffer

IPC分类号： H03B100

CPC分类号： H03B5/18 ,  H03B27/00 ,  H03B2201/0208

摘要： A method and apparatus for producing high-frequency oscillations is disclosed. A new resonator architecture minimizes via losses and supports a compact layout of active circuitry. The resonator architecture incorporates dual resonant transmission lines to reduce resonator loss and facilitate compact layout. The oscillations of two oscillators are cross-coupled in a way that compensates for the delay in the active devices of the oscillator, thus permitting accurate alignment of the active circuitry response with the oscillation waveform. The cross-coupling of the two oscillators improves phase noise performance and eliminates spurious oscillations. An active circuit architecture provides very narrow pulses for the operation of the oscillator. This architecture provides for accurate cross-coupling and pulsed-mode operation to improve manufacturing stability and phase noise performance.

摘要翻译： 公开了一种用于产生高频振荡的方法和装置。 新的谐振器架构可最大限度地减少通路损耗，并支持有源电路的紧凑布局。 谐振器结构包含双谐振传输线，以减少谐振器损耗并促进紧凑布局。 两个振荡器的振荡以补偿振荡器的有源器件的延迟的方式交叉耦合，从而允许有源电路响应与振荡波形的精确对准。 两个振荡器的交叉耦合提高了相位噪声性能，并消除了杂散振荡。 有源电路架构为振荡器的操作提供非常窄的脉冲。 该架构提供精确的交叉耦合和脉冲模式操作，以提高制造稳定性和相位噪声性能。

公开(公告)号：US09006832B2

公开(公告)日：2015-04-14

申请号：US13071374

申请日：2011-03-24

申请人： Derek Shaeffer ,  Baris Cagdaser ,  Joseph Seeger

发明人： Derek Shaeffer ,  Baris Cagdaser ,  Joseph Seeger

IPC分类号： H01L23/62 ,  H01L21/00 ,  H01L27/092 ,  H01L21/8238 ,  B81B7/00

CPC分类号： H01L27/092 ,  B81B7/008 ,  B81B2207/015 ,  H01L21/823892

摘要： A high-voltage MEMS system compatible with low-voltage semiconductor process technology is disclosed. The system comprises a MEMS device coupled to a high-voltage bias generator employing an extended-voltage isolation residing in a semiconductor technology substrate. The system avoids the use of high-voltage transistors so that special high-voltage processing steps are not required of the semiconductor technology, thereby reducing process cost and complexity. MEMS testing capability is addressed with a self-test circuit allowing modulation of the bias voltage and current so that a need for external high-voltage connections and associated electro-static discharge protection circuitry are also avoided.

摘要翻译： 公开了一种兼容低压半导体工艺技术的高压MEMS系统。 该系统包括耦合到高电压偏置发生器的MEMS器件，其采用驻留在半导体技术衬底中的扩展电压隔离。 该系统避免使用高压晶体管，因此不需要半导体技术的特殊高压处理步骤，从而降低工艺成本和复杂性。 利用允许调制偏置电压和电流的自检电路解决MEMS测试能力，从而也避免了外部高压连接和相关静电放电保护电路的需要。

公开(公告)号：US08860409B2

公开(公告)日：2014-10-14

申请号：US13004365

申请日：2011-01-11

申请人： Joseph Seeger ,  Chiung C. Lo ,  Baris Cagdaser ,  Derek Shaeffer

发明人： Joseph Seeger ,  Chiung C. Lo ,  Baris Cagdaser ,  Derek Shaeffer

IPC分类号： G01R33/02 ,  G01R33/028 ,  G01R33/038

CPC分类号： G01R33/038 ,  G01R33/0286

摘要： A micromachined magnetic field sensor is disclosed. The micromachined magnetic field comprises a substrate; a drive subsystem, the drive subsystem comprises a plurality of beams, and at least one anchor connected to the substrate; a mechanism for providing an electrical current through the drive subsystem along a first axis; and Lorentz force acting on the drive subsystem along a second axis in response to a magnetic field along a third axis. The micromachined magnetic field sensor also includes a sense subsystem, the sense subsystem includes a plurality of beams, and at least one anchor connected to the substrate; wherein a portion of the sense subsystem moves along a fourth axis; a coupling spring between the drive subsystem and the sense subsystem which causes motion of the sense subsystem in response to the magnetic field; and a position transducer to detect the motion of the sense subsystem.

摘要翻译： 公开了一种微加工磁场传感器。 微加工磁场包括基片; 驱动子系统，所述驱动子系统包括多个梁，以及连接到所述基板的至少一个锚固件; 用于沿着第一轴线提供穿过所述驱动子系统的电流的机构; 以及响应于沿着第三轴的磁场沿第二轴作用在驱动子系统上的洛伦兹力。 微加工磁场传感器还包括感测子系统，感测子系统包括多个光束，以及至少一个连接到衬底的锚; 其中所述感测子系统的一部分沿着第四轴线移动; 驱动子系统和感测子系统之间的耦合弹簧，其引起感测子系统响应于磁场的运动; 以及用于检测感测子系统的运动的位置传感器。

公开(公告)号：US08760392B2

公开(公告)日：2014-06-24

申请号：US12869837

申请日：2010-08-27

申请人： Stephen Lloyd ,  David Sachs ,  David Devries ,  Doug Vargha ,  Derek Shaeffer ,  Erik Anderson ,  Kerry Keal ,  Nathan Royer

发明人： Stephen Lloyd ,  David Sachs ,  David Devries ,  Doug Vargha ,  Derek Shaeffer ,  Erik Anderson ,  Kerry Keal ,  Nathan Royer

IPC分类号： G09G5/00 ,  G06F3/0346 ,  G06F19/00 ,  A63F13/06 ,  G01P15/00

CPC分类号： A63F13/211 ,  A63F13/06 ,  A63F13/235 ,  A63F2300/1006 ,  A63F2300/1031 ,  A63F2300/105 ,  G01P15/00 ,  G06F3/011 ,  G06F3/0346 ,  G06F3/038

摘要： The present invention relates to a combination of a 6-axis motion sensor having a 3-axis gyroscope and a 3-axis linear accelerometer, a motion processor and a radio integrated circuit chip (IC), wherein the intelligence in the motion processor enables the communication between the motion sensor, the radio IC and the external network. The motion processor also enables power savings by adaptively controlling the data rate of the motion sensor, depending on the amount or speed of the motion activity.

摘要翻译： 本发明涉及具有3轴陀螺仪和3轴线性加速度计的6轴运动传感器，运动处理器和无线电集成电路芯片（IC）的组合，其中运动处理器中的智能使得能够 运动传感器，无线电IC和外部网络之间的通信。 运动处理器还通过根据运动活动的量或速度自适应地控制运动传感器的数据速率来实现功率节省。

公开(公告)号：US08639286B2

公开(公告)日：2014-01-28

申请号：US13336423

申请日：2011-12-23

申请人： Mohamed A. Mostafa ,  Derek Shaeffer

发明人： Mohamed A. Mostafa ,  Derek Shaeffer

IPC分类号： H04M1/00

CPC分类号： H04B1/005 ,  H03H7/38 ,  H04B1/0064 ,  H04B1/0067 ,  H04B1/0458 ,  H04B1/18

摘要： Systems and methods are provided for a broadband, closed-loop RF transmitter for multi-band applications that employs a single RF path to service multiple bands of operation. Embodiments of the present disclosure implement a broadband impedance matching module, which avoids the need for several costly and complex narrow-band matching networks. In an embodiment, the broadband impedance matching module includes concentric, mutually-coupled inductors. By adding this broadband impedance matching functionality, delay is significantly reduced because a single path can be used to service multiple bands.

摘要翻译： 提供了一种用于多频带应用的宽带闭环RF发射机的系统和方法，其采用单个RF路径来服务多个操作频带。 本公开的实施例实现宽带阻抗匹配模块，其避免了对几个昂贵且复杂的窄带匹配网络的需要。 在一个实施例中，宽带阻抗匹配模块包括同心的，相互耦合的电感器。 通过添加这种宽带阻抗匹配功能，延迟显着降低，因为可以使用单个路径来服务多个频带。

公开(公告)号：US07295068B2

公开(公告)日：2007-11-13

申请号：US11134684

申请日：2005-05-19

申请人： Peter Capofreddi ,  Arvin Ramesh Shahani ,  Derek Shaeffer ,  Korhan Titizer

发明人： Peter Capofreddi ,  Arvin Ramesh Shahani ,  Derek Shaeffer ,  Korhan Titizer

IPC分类号： H03F3/45

CPC分类号： H03F3/45183 ,  H03F3/45672

摘要： A transconductance cell is disclosed that includes a first transistor and a second transistor. A regulator regulates an average voltage in response to a reference voltage, where the average voltage corresponds to the average of a voltage at a bias terminal of the first transistor and a voltage at a bias terminal of the second transistor. A mixer including the transconductance cell is also disclosed. In the mixer, the transconductance cell receives a differential input voltage and produces a differential output current. The mixer also includes one or more switches that multiply the differential output current with an oscillator signal. A method is disclosed that includes measuring an average voltage of a voltage at a bias terminal of a first transistor and a voltage at a bias terminal of a second transistor and regulating the average voltage responsive to the measured average voltage and a reference voltage.

摘要翻译： 公开了一种跨导单元，其包括第一晶体管和第二晶体管。 调节器响应于参考电压来调节平均电压，其中平均电压对应于第一晶体管的偏置端子处的电压的平均值和第二晶体管的偏置端子处的电压。 还公开了包括跨导电池的混合器。 在混频器中，跨导单元接收差分输入电压并产生差分输出电流。 混频器还包括一个或多个将差分输出电流与振荡器信号相乘的开关。 公开了一种方法，其包括测量第一晶体管的偏置端子处的电压的平均电压和第二晶体管的偏置端子处的电压，并响应于测量的平均电压和参考电压来调节平均电压。