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。

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。

公开(公告)号：US5883594A

公开(公告)日：1999-03-16

申请号：US803335

申请日：1997-02-20

申请人： Chung Y. Lau

发明人： Chung Y. Lau

IPC分类号： G01S19/24 ,  G01S1/00 ,  G01S5/02

CPC分类号： G01S19/34 ,  G01S19/252 ,  G01S19/258

摘要： A message system, global positioning system (GPS) receiver apparatus, and method for providing a fast time to first location fix and a low average power consumption in a GPS receiver. The message system includes a GPS base station for receiving a GPS signal and providing GPS acquisition and location information including GPS satellite visibility, health, and ephemeris; and a message system manager for transmitting a radio message signal including a wakeup call and the GPS information. A message transceiver or receiver receives the radio message signal and passes the wakeup call and GPS information to a GPS receiver having a low power standby mode. The GPS receiver awakens from the standby mode and enters an operational mode for using the GPS information for acquiring the GPS signal and deriving the first location fix. In a first embodiment, the GPS receiver initiates the first fix by requesting the message transceiver to transmit a radio request signal. In a second embodiment, message system initiates the first fix by transmitting the radio message signal.

摘要翻译： 一种消息系统，全球定位系统（GPS）接收装置和方法，用于在GPS接收机中提供第一定位的快速时间和低的平均功耗。 该消息系统包括一个GPS基站，用于接收GPS信号，并提供包括GPS卫星可见性，健康和星历的GPS获取和位置信息; 以及消息系统管理器，用于发送包括唤醒呼叫和GPS信息的无线电消息信号。 消息收发器或接收器接收无线电消息信号并将唤醒呼叫和GPS信息传递到具有低功率待机模式的GPS接收机。 GPS接收器从待机模式唤醒，并进入使用GPS信息获取GPS信号并导出第一定位的操作模式。 在第一实施例中，GPS接收机通过请求消息收发器来发送无线电请求信号来发起第一个定位。 在第二实施例中，消息系统通过发送无线电消息信号来发起第一个固定。

公开(公告)号：US5629708A

公开(公告)日：1997-05-13

申请号：US634612

申请日：1996-04-18

申请人： Eric B. Rodal ,  Dominic G. Farmer ,  Chung Y. Lau

发明人： Eric B. Rodal ,  Dominic G. Farmer ,  Chung Y. Lau

IPC分类号： G01S1/00 ,  G01S5/02

CPC分类号： G01S19/235 ,  G01S19/34

摘要： A GPS receiver having a rapid acquisition of a GPS satellite signal when a normal operational mode is entered after a low power standby mode. The GPS receiver includes an RF section for receiving the GPS satellite signal and providing an GPS IF signal, a correlator section for providing a correlation signal for the correlation between the GPS IF signal and an internally generated replica signal, and a microprocessor section for receiving the correlation signal and calculating a geographical location of the GPS receiver. The replica signal is based upon a reference frequency from a reference oscillator and a reference time of arrival (TOA) from a timer. In order to increase acquisition speed, the microprocessor section provides the correlator section with an initial frequency adjustment and an initial TOA adjustment to correct for drift in the reference frequency during the standby mode. The initial adjustments are based upon a learned corrections to the initial adjustments that result in acquisition of the GPS satellite signal after alternating one or more times between the standby mode and the normal mode or from stored temperature relationships and measured temperatures of the reference oscillator.

摘要翻译： 当在低功率待机模式之后进入正常操作模式时，具有快速获取GPS卫星信号的GPS接收机。 GPS接收机包括用于接收GPS卫星信号并提供GPS IF信号的RF部分，用于提供用于GPS IF信号与内部生成的副本信号之间的相关性的相关信号的相关器部分和用于接收 相关信号并计算GPS接收机的地理位置。 复制信号基于来自参考振荡器的参考频率和来自定时器的参考到达时间（TOA）。 为了提高采集速度，微处理器部分为相关器部分提供初始频率调整和初始TOA调整，以在待机模式期间校正参考频率中的漂移。 初始调整基于对在待机模式和正常模式之间交替一次或多次之后或从存储的温度关系和参考振荡器的测量温度交替导致获取GPS卫星信号的初始调整的学习校正。

公开(公告)号：US5592173A

公开(公告)日：1997-01-07

申请号：US276886

申请日：1994-07-18

申请人： Chung Y. Lau ,  Dominic G. Farmer ,  Kreg A. Martin ,  Eric B. Rodal

发明人： Chung Y. Lau ,  Dominic G. Farmer ,  Kreg A. Martin ,  Eric B. Rodal

IPC分类号： G01S1/00 ,  H04B1/16 ,  G01S5/02 ,  G06F1/00

CPC分类号： G01S19/37 ,  G01S19/34 ,  H04W52/0293 ,  H04W52/028 ,  Y02B60/50

摘要： A GPS receiver having a normal mode to receive GPS satellite signals and to provide location information, and a low power standby mode. A microprocessor system in the GPS receiver causes the GPS receiver to alternate between the normal mode and the low power standby mode in order to reduce the average power consumption in the GPS receiver. In the normal mode a GPS antenna receives GPS satellite signals, the GPS frequency downconverter converts the frequency of the GPS satellite signals to an intermediate frequency, a digital signal processing system processes the intermediate frequency to provide GPS satellite signal correlation information. The microprocessor system processes the correlation information and provides location information to a user. In the standby mode, the operating power is inhibited in the GPS antenna and the GPS frequency downconverter, the system clock is inhibited in the digital processing system, and the microprocessor clock is inhibited in the microprocessor system.

摘要翻译： 具有正常模式以接收GPS卫星信号并提供位置信息的GPS接收机以及低功率待机模式。 GPS接收机中的微处理器系统使得GPS接收机在正常模式和低功率待机模式之间交替，以便降低GPS接收机中的平均功耗。 在正常模式下，GPS天线接收GPS卫星信号，GPS下变频器将GPS卫星信号的频率转换为中频，数字信号处理系统处理中频提供GPS卫星信号相关信息。 微处理器系统处理相关信息并向用户提供位置信息。 在待机模式下，在GPS天线和GPS下变频器中禁止工作电源，在数字处理系统中禁止系统时钟，微处理器系统中的微处理器时钟被禁止。

公开(公告)号：US4717894A

公开(公告)日：1988-01-05

申请号：US922383

申请日：1986-10-23

申请人： Allen P. Edwards ,  David R. Gildea ,  Chung Y. Lau

发明人： Allen P. Edwards ,  David R. Gildea ,  Chung Y. Lau

IPC分类号： G01R35/00 ,  H04J11/00 ,  H04L27/00 ,  H04L27/36 ,  H03C5/00

CPC分类号： H04L27/364 ,  G01R35/005 ,  H04L2027/0016 ,  H04L2027/0018

摘要： Calibration of a vector modulator is done using a scalar detector to measure the amplitude of the RF output signal, phase shifters to adjust the relative phases of the I and Q components of the RF carrier, and variable attenuators in the I and Q modulation signal input lines to adjust the relative amplitude of the modulation signals. DC signal sources provide reference signals for the I and Q modulation inputs, carrier leak compensation signals, and calibration signals for balancing the amplitude of the I and Q modulation signals. An iterative four step calibration process is followed until no change in the results is observed. The quadrature phase error is minimized by adjusting the phase shifters. The carrier leakage is minimized by adjusting the carrier leak compensation sources to minimize RF output with the modulation inputs grounded. The amplitudes of the I and Q modulation signals are balanced by adjusting the attenuators until the output amplitudes are equal. Finally, the quadrature calibration signal sources are adjusted until the output amplitudes they produce are balanced.

摘要翻译： 使用标量检测器来校准矢量调制器，以测量RF输出信号的幅度，移相器调整RF载波的I和Q分量的相对相位，以及I和Q调制信号输入中的可变衰减器 线调整调制信号的相对幅度。 直流信号源为I和Q调制输入提供参考信号，载波泄漏补偿信号和用于平衡I和Q调制信号振幅的校准信号。 遵循迭代的四步校准过程，直到没有观察到结果的变化。 通过调整移相器来使正交相位误差最小化。 通过调整载波泄漏补偿源，使调制输入接地的RF输出最小化，使载波泄漏最小化。 I和Q调制信号的幅度通过调节衰减器直到输出幅度相等来平衡。 最后，校正正交校准信号源，直到它们产生的输出振幅平衡。

公开(公告)号：US5365192A

公开(公告)日：1994-11-15

申请号：US105026

申请日：1993-08-11

申请人： Gary L. Wagner ,  Chung Y. Lau

发明人： Gary L. Wagner ,  Chung Y. Lau

IPC分类号： H03F3/19 ,  H03F3/45

CPC分类号： H03F3/45197 ,  H03F3/19 ,  H03F3/45103 ,  H03F2203/45458 ,  H03F2203/45464

摘要： An embodiment of the present invention combines, on a single integrated circuit, a first bipolar transistor in a common-emitter configuration capacitively coupled to a second bipolar transistor in a common-base configuration, together with a capacitive input coupling for a single-ended input and directly-coupled collector outputs for a differential-output for driving successive differential-input and differential-output emitter-coupled transistor pairs for multiple stages of amplifier gain.

摘要翻译： 本发明的一个实施例在单个集成电路上组合以共共基极配置电容耦合到第二双极晶体管的共发射极配置中的第一双极晶体管，以及用于单端输入的电容输入耦合 和用于差分输出的直接耦合集电极输出，用于驱动多级放大器增益的连续差分输入和差分输出发射极耦合晶体管对。

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。

公开(公告)号：US6115595A

公开(公告)日：2000-09-05

申请号：US71977

申请日：1998-05-04

申请人： Eric B. Rodal ,  Chung Y. Lau

发明人： Eric B. Rodal ,  Chung Y. Lau

IPC分类号： H04B1/28

CPC分类号： H04B1/28 ,  G01S19/34 ,  G01S19/32

摘要： A GPS receiver including an RF GPS integrated circuit downconverter having a standby mode controlled by a power supply input used as a logic signal. The RF 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 using a clock signal 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 an external or internally generated reference frequency is selected. A GPS digital signal processor integrated circuit issues the logic signal and the clock signal from a single pin.

摘要翻译： 一种GPS接收机，包括具有由用作逻辑信号的电源输入控制的待机模式的RF GPS集成电路下变频器。 RF 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，以及用于使用时钟信号的采样器，用于提供表示该信号的同相和正交相位采样的输出信号 GPS信号。 合成器包括多模式分频器，用于当选择外部或内部产生的参考频率时，在L1和L2 GPS频率的中点附近提供基本相同的第一LO频率。 GPS数字信号处理器集成电路从单个引脚发出逻辑信号和时钟信号。

公开(公告)号：US5594453A

公开(公告)日：1997-01-14

申请号：US332958

申请日：1994-11-01

申请人： Eric B. Rodal ,  Dominic G. Farmer ,  Chung Y. Lau

发明人： Eric B. Rodal ,  Dominic G. Farmer ,  Chung Y. Lau

IPC分类号： G01S1/00 ,  G01S5/02

CPC分类号： G01S19/235 ,  G01S19/34

摘要： A GPS receiver having a rapid acquisition of a GPS satellite signal when a normal operational mode is entered after a low power standby mode. The GPS receiver includes an RF section for receiving the GPS satellite signal and providing an GPS IF signal, a correlator section for providing a correlation signal for the correlation between the GPS IF signal and a GPS replica signal, and a microprocessor section for receiving the correlation signal and calculating a geographical location of the GPS receiver. The GPS replica signal is based upon a reference frequency from a reference oscillator and a reference time from a timer. In the standby mode, the operation of the RF section, correlator section, and microprocessor section is inhibited while the reference oscillator and time continue to operate. In order to increase acquisition speed upon entering the normal mode, the microprocessor section provides the correlator section with an initial frequency adjustment to correct for drift in the reference frequency during the standby mode. The microprocessor section provides the initial frequency adjustment based upon a learned frequency correction that is based upon the frequency adjustment that results in acquisition of the GPS satellite signal after alternating one or more times between the standby mode and the normal mode. Alternately, the initial frequency adjustment is calculated from a stored frequency/temperature relationship and a temperature for the reference oscillator measured by a temperature sensor.

摘要翻译： 当在低功率待机模式之后进入正常操作模式时，具有快速获取GPS卫星信号的GPS接收机。 GPS接收机包括用于接收GPS卫星信号并提供GPS IF信号的RF部分，用于提供GPS IF信号与GPS复制信号之间的相关性的相关信号的相关器部分和用于接收相关性的微处理器部分 信号并计算GPS接收机的地理位置。 GPS复制信号基于来自参考振荡器的参考频率和来自定时器的参考时间。 在待机模式下，当参考振荡器和时间继续工作时，禁止RF部分，相关器部分和微处理器部分的操作。 为了在进入正常模式时提高采集速度，微处理器部分为相关器部分提供初始频率调整，以在待机模式期间校正参考频率中的漂移。 微处理器部分基于在待机模式和正常模式之间交替一次或多次之后基于进行GPS卫星信号获取的频率调整的学习频率校正来提供初始频率调整。 或者，初始频率调整是由存储的频率/温度关系和由温度传感器测量的基准振荡器的温度计算的。