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    Apparatus and method of using spread pulse modulation to increase the control resolution of an electronic device
    2.
    发明授权
    Apparatus and method of using spread pulse modulation to increase the control resolution of an electronic device 有权
    使用扩展脉冲调制以增加电子设备的控制分辨率的装置和方法

    公开(公告)号：US07443328B2

    公开(公告)日：2008-10-28

    申请号：US11843504

    申请日：2007-08-22

    申请人： Charles F. Barry ,  Tian Shen ,  Reed A. Parker ,  Feng F. Pan ,  Meenakshi Subramanian

    发明人： Charles F. Barry ,  Tian Shen ,  Reed A. Parker ,  Feng F. Pan ,  Meenakshi Subramanian

    IPC分类号： H03M1/66

    CPC分类号： H03M1/66 ,  H03J7/02 ,  H03J2200/02 ,  H03J2200/07

    摘要： An apparatus and method are described to increase the control resolution of an electronic device. In one embodiment, the invention includes a spread pulse modulation module to generate a first set of bits based on a second set of bits that is larger than the first set of bits. The spread pulse modulation module modulates the least significant bit (LSB) of the first set of bits based on information including the LSB modulation period and the LSB modulation duty cycle. The spread pulse modulation module also modulates the least significant bit of the first set of bits so that the least significant bit transitions at least twice from a high value to a low value during the modulation period. This embodiment of the invention also includes a digital-to-analog conversion module to generate an analog input signal to the electronic device based on the first set of bits.

    摘要翻译： 描述了一种用于增加电子设备的控制分辨率的装置和方法。 在一个实施例中，本发明包括扩展脉冲调制模块，用于基于大于第一组位的第二组位产生第一组位。 扩展脉冲调制模块基于包括LSB调制周期和LSB调制占空比的信息来调制第一组位的最低有效位（LSB）。 扩展脉冲调制模块还调制第一组位的最低有效位，使得最低有效位在调制周期期间从高值至少两次转变为低值。 本发明的该实施例还包括数模转换模块，用于基于第一组位产生到电子设备的模拟输入信号。

    Low profile antenna
    6.
    发明授权
    Low profile antenna 失效
    低调天线

    公开(公告)号：US5467095A

    公开(公告)日：1995-11-14

    申请号：US261742

    申请日：1994-06-17

    申请人： Eric B. Rodal ,  Reed A. Parker

    发明人： Eric B. Rodal ,  Reed A. Parker

    IPC分类号： H01Q9/04 ,  H01Q1/38

    CPC分类号： H01Q9/0407

    摘要： An antenna has a ground plane and a radiating element supported in electrically insulated, closely spaced-apart relation to the ground plane. Electrical energy is fed to the radiating element for radiation therefrom. The radiating element is constructed so as to lengthen at least one effective electrical dimension of the radiating element relative to a corresponding dimension of an orthogonal projection of the radiating element onto a plane parallel to the ground plane. In the preferred embodiment, the radiating element has a central plane portion substantially parallel to the ground plane, an outer flange portion extending towards the ground plane, and a square cutout centered with respect to the central plane portion.

    摘要翻译： 天线具有接地平面和辐射元件，该辐射元件与地平面以电绝缘的，紧密间隔的方式支撑。 电能被馈送到辐射元件用于从其辐射。 辐射元件被构造成将辐射元件的至少一个有效电尺寸相对于辐射元件的正交投影的相应尺寸延伸到平行于接地平面的平面上。 在优选实施例中，辐射元件具有基本上平行于接地平面的中心平面部分，朝向接地平面延伸的外凸缘部分和相对于中心平面部分居中的方形切口。

    Integrated phase locked loop local oscillator
    7.
    发明授权
    Integrated phase locked loop local oscillator 失效
    集成锁相环本地振荡器

    公开(公告)号：US5311149A

    公开(公告)日：1994-05-10

    申请号：US30678

    申请日：1993-03-12

    申请人： Gary L. Wagner ,  Chung Y. Lau ,  Reed A. Parker

    发明人： Gary L. Wagner ,  Chung Y. Lau ,  Reed A. Parker

    IPC分类号： H03D7/16 ,  H03L7/08 ,  H04B1/28 ,  H03B5/12

    CPC分类号： H03D7/163 ,  H03L7/08 ,  H04B1/28

    摘要： An embodiment of the present invention is a single-chip GPS receiver front-end comprising a radio frequency amplifier, a voltage-controlled oscillator operating at a first local oscillator frequency, a divide by seven and one-half counter for deriving a second local oscillator frequency from the first and a first and second mixer. The local oscillator frequency is mid-way between two carrier frequencies of interest that may be received by the radio frequency amplifier and the first mixer produces a first intermediate frequency. The second local oscillator frequency is then beat with the first intermediate frequency in the second mixer to produce a second intermediate frequency. A dual-conversion super heterodyne configuration is therefore employed in which the first and second local oscillator frequencies are derived from a single oscillator and the first local oscillator frequency is seven and one-half times the second local oscillator frequency.

    摘要翻译： 本发明的一个实施例是一种单芯片GPS接收器前端，其包括射频放大器，以第一本地振荡器频率工作的压控振荡器，除以七和一半计数器，用于导出第二本地振荡器 频率从第一和第一和第二混合器。 本地振荡器频率是可以由射频放大器接收的两个感兴趣载波频率之间的中间，并且第一混频器产生第一中间频率。 然后在第二混频器中以第一中间频率击打第二本地振荡器频率以产生第二中频。 因此，采用双转换超外差配置，其中第一和第二本地振荡器频率从单个振荡器导出，并且第一本地振荡器频率是第二本地振荡器频率的七倍和二分之一倍。

    RF integrated circuit for downconverting a GPS signal
    8.
    发明授权
    RF integrated circuit for downconverting a GPS signal 失效
    RF集成电路，用于下变频GPS信号

    公开(公告)号：US06356602B1

    公开(公告)日：2002-03-12

    申请号：US09073207

    申请日：1998-05-04

    申请人： Eric B. Rodal ,  Chung Y. Lau ,  Reed A. Parker ,  Gary L. Wagner

    发明人： Eric B. Rodal ,  Chung Y. Lau ,  Reed A. Parker ,  Gary L. Wagner

    IPC分类号： H04L2706

    CPC分类号： G01S19/36 ,  G01S19/34 ,  H03B5/1209 ,  H03B5/1231 ,  H03B5/124 ,  H03B2201/0208 ,  H03D7/163 ,  H03J1/0041 ,  H04L27/06

    摘要： A GPS receiver and an RF GPS integrated circuit for receiving a GPS signal. The GPS integrated circuit includes a synthesizer for generating LO signals, first and second downconverters for using the LO signals for downconverting the GPS signal, and a sampler for providing in-phase and quadrature phase sampled output signals representative of the GPS signal. The synthesizer includes a multi-mode divider for providing substantially the same first LO frequency at about the midpoint of the L1 and L2 GPS lo frequencies for either of two reference frequencies. The RF GPS integrated circuit uses an entirely on-chip voltage controlled oscillator (VCO) having a resonator for generating the LO signals and an entirely on-chip filter for filtering a first intermediate frequency signal.

    摘要翻译： GPS接收机和用于接收GPS信号的RF GPS集成电路。 GPS集成电路包括用于产生LO信号的合成器，用于使用LO信号进行下变频的GPS信号的第一和第二下变频器，以及用于提供表示GPS信号的同相和正交相位采样的输出信号的采样器。 合成器包括多模式分频器，用于在两个参考频率中的任一个的L1和L2 GPS lo频率的中点附近提供基本相同的第一LO频率。 RF GPS集成电路使用具有用于产生LO信号的谐振器的完全片上压控振荡器（VCO）和用于滤波第一中频信号的完全片上滤波器。

    GSM cellular telephone and GPS receiver combination
    9.
    发明授权
    GSM cellular telephone and GPS receiver combination 失效
    GSM蜂窝电话和GPS接收机组合

    公开(公告)号：US6122506A

    公开(公告)日：2000-09-19

    申请号：US72295

    申请日：1998-05-04

    申请人： Chung Y. Lau ,  Reed A. Parker ,  Eric B. Rodal

    发明人： Chung Y. Lau ,  Reed A. Parker ,  Eric B. Rodal

    IPC分类号： G01S1/00 ,  G01S5/14 ,  G01S19/48 ,  H03D7/16 ,  H03L7/197 ,  H04B1/38 ,  H04B1/40 ,  H04Q7/20

    CPC分类号： G01S19/36 ,  G01S19/235 ,  H03D7/165 ,  H04B1/005 ,  H04B1/0057 ,  H04B1/3805 ,  H04B1/406 ,  H03L7/1974

    摘要： A GPS/GSM receiver combination for receiving GSM and GPS signals using an RF GPS integrated circuit for downconverting the GPS signal. The GPS integrated circuit includes a synthesizer for generating LO signals, first and second downconverters for using the LO signals for downconverting the GPS signal, and a sampler for providing in-phase and quadrature phase sampled output signals representative of the GPS signal. The synthesizer includes a multi-mode divider for providing substantially the same first LO frequency at about the midpoint of the L1 and L2 GPS frequencies when either of a standard GSM reference frequency or historically common GPS reference frequency is selected. A standby mode in the integrated circuit is controlled by a power logic circuit using a power supply input as a logic control signal. The GSM/GPS receiver combination includes a GSM reference oscillator and a microprocessor system including a GSM frequency correction code for correcting the GSM reference frequency based upon a frequency correction beacon (FCB) signal received in the GSM signal. The GSM-based correction is then used for correcting the GSM reference frequency in order to center a frequency search for acquiring the GPS signal.

    摘要翻译： GPS / GSM接收机组合，用于使用RF GPS集成电路接收GSM和GPS信号，用于下变频GPS信号。 GPS集成电路包括用于产生LO信号的合成器，用于使用LO信号进行下变频的GPS信号的第一和第二下变频器，以及用于提供表示GPS信号的同相和正交相位采样的输出信号的采样器。 合成器包括多模式分频器，用于当选择标准GSM参考频率或历史上常见的GPS参考频率之一时，在L1和L2 GPS频率的中点附近提供基本上相同的第一LO频率。 集成电路中的待机模式由使用电源输入作为逻辑控制信号的电源逻辑电路来控制。 GSM / GPS接收机组合包括GSM参考振荡器和包括GSM频率校正码的微处理器系统，用于基于在GSM信号中接收到的频率校正信标（FCB）信号来校正GSM参考频率。 然后，基于GSM的校正用于校正GSM参考频率，以便中心用于获取GPS信号的频率搜索。