公开(公告)号：US20080150645A1

公开(公告)日：2008-06-26

申请号：US12036165

申请日：2008-02-22

Applicant: Michael Shannon McCorquodale ,  Scott Michael Pernia ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner

Inventor： Michael Shannon McCorquodale ,  Scott Michael Pernia ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner

IPC: H03B5/12 ,  H03L1/02

CPC classification number: G06F1/04 ,  G06F1/08 ,  H03B5/06 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1221 ,  H03B5/124 ,  H03B2201/025 ,  H03J1/0008 ,  H03J2200/10 ,  H03L1/00 ,  H03L1/02 ,  H03L1/022 ,  H03L1/025 ,  H03L3/00 ,  H03L7/08 ,  H03L7/0812 ,  H03L7/099 ,  H03L7/183 ,  H03L2207/50

Abstract: In various embodiments, the invention provides a discrete clock generator and/or a timing and frequency reference using an LC-oscillator topology, having a frequency controller to control and provide a stable resonant frequency, which may then be provided to other, second circuitry such as a processor or controller. Frequency stability is provided over variations in a selected parameter such as temperature and fabrication process variations. The various apparatus embodiments include a sensor adapted to provide a signal in response to at least one parameter of a plurality of parameters; and a frequency controller adapted to modify the resonant frequency in response to the second signal. In exemplary embodiments, the sensor is implemented as a current source responsive to temperature fluctuations, and the frequency controller is implemented as a plurality of controlled reactance modules which are selectively couplable to the resonator or to one or more control voltages. The controlled reactance modules may include fixed or variable capacitances or inductances, and may be binary weighted. Arrays of resistive modules are also provided, to generate one or more control voltages.

Abstract translation: 在各种实施例中，本发明提供使用LC振荡器拓扑的离散时钟发生器和/或定时和频率参考，其具有频率控制器来控制和提供稳定的谐振频率，然后可以将其提供给其它第二电路，例如 作为处理器或控制器。 提供了频率稳定性，如选择的参数（如温度和制造工艺变化）的变化。 各种装置实施例包括适于响应于多个参数的至少一个参数提供信号的传感器; 以及频率控制器，其适于响应于所述第二信号来修改所述谐振频率。 在示例性实施例中，响应于温度波动将传感器实现为电流源，并且频率控制器被实现为可选择地耦合到谐振器或一个或多个控制电压的多个受控电抗模块。 受控电抗模块可以包括固定或可变电容或电感，并且可以是二进制加权的。 还提供了电阻模块的阵列，以产生一个或多个控制电压。

公开(公告)号：US20080039116A1

公开(公告)日：2008-02-14

申请号：US11771831

申请日：2007-06-29

Applicant: Charles Abraham

Inventor： Charles Abraham

IPC: H04Q7/22 ,  G01S1/00

CPC classification number: H03B5/04 ,  G01S19/235 ,  H03J1/0008 ,  H03J3/04 ,  H03J2200/11 ,  H03L1/025 ,  H03L1/026 ,  H04B1/3805

Abstract: A method and apparatus for compensating an oscillator in a location-enabled wireless device is described. In an example, a mobile device includes a wireless receiver for receiving wireless signals and a GPS receiver for receiving GPS signals. The mobile device also includes an oscillator having an associated temperature model. A frequency error is derived from a wireless signal. The temperature model is adjusted in response to the frequency error and a temperature proximate the oscillator. Frequency error of the oscillator is compensated using the adjusted temperature model. In another example, a frequency error is derived using a second oscillator within the wireless receiver.

Abstract translation: 描述了一种用于补偿位置使能无线设备中的振荡器的方法和装置。 在一个示例中，移动设备包括用于接收无线信号的无线接收器和用于接收GPS信号的GPS接收器。 移动设备还包括具有相关温度模型的振荡器。 从无线信号导出频率误差。 温度模型根据频率误差和振荡器附近的温度进行调整。 使用调整后的温度模型对振荡器的频率误差进行补偿。 在另一示例中，使用无线接收器内的第二振荡器导出频率误差。

公开(公告)号：US20070182467A1

公开(公告)日：2007-08-09

申请号：US11488047

申请日：2006-07-18

Applicant: Koji Nakamuta

Inventor： Koji Nakamuta

IPC: H03L7/06

CPC classification number: H03L1/025 ,  H03L1/022 ,  H03L7/0994

Abstract: The invention relates to a digital synchronization network, and provides a DPLL circuit having a holdover function that generates a high-precision reference clock with a temperature correction to perform a free-running frequency control at a holdover time. In a holdover mode of the DPLL circuit using a DDS, the DPLL circuit having a holdover function adds a correction value calculated from a temperature characteristic of a slave oscillator to a fixed DDS control value during a detection of a holdover, thereby changing the DDS control value according to the temperature characteristic.

Abstract translation: 本发明涉及数字同步网络，并且提供具有保持功能的DPLL电路，其产生具有温度校正的高精度参考时钟，以在保持时间执行自由运行的频率控制。 在使用DDS的DPLL电路的保持模式下，具有保持功能的DPLL电路在保持检测期间将从从振荡器的温度特性计算的校正值与固定的DDS控制值相加，从而改变DDS控制 值根据温度特性。

公开(公告)号：US20070075797A1

公开(公告)日：2007-04-05

申请号：US11541559

申请日：2006-10-03

Applicant: Yuichi Matsuya ,  Ryuji Ariyoshi

Inventor： Yuichi Matsuya ,  Ryuji Ariyoshi

IPC: H03B5/32

CPC classification number: H03L1/022 ,  H03L1/025 ,  H03L1/028

Abstract: The method of manufacturing a crystal oscillator that is compensated for temperature with low-cost, and a crystal oscillator that is compensated for temperature by the method is disclosed. A plurality of crystal oscillators are manufactured by preparing a compensation circuit that generates a common compensation voltage in accordance with a predetermined compensation curve expressed by a quintic polynomial of an ambient temperature; and manufacturing each of the plurality of crystal oscillators by integrating the compensation circuit with a voltage controlled oscillation circuit including a crystal resonator, the common compensation voltage generated by the compensation circuit being supplied to the voltage controlled oscillation circuit so that the temperature characteristic of the crystal resonator is compensated.

Abstract translation: 公开了以低成本补偿温度的晶体振荡器的制造方法和通过该方法补偿温度的晶体振荡器。 通过制备补偿电路来制造多个晶体振荡器，该补偿电路根据由环境温度的五次多项式表示的预定补偿曲线产生公共补偿电压; 并且通过将补偿电路与包括晶体谐振器的压控振荡电路进行积分来制造多个晶体振荡器，由补偿电路产生的公共补偿电压被提供给压控振荡电路，使得晶体的温度特性 谐振器被补偿。

公开(公告)号：US20060158268A1

公开(公告)日：2006-07-20

申请号：US11384973

申请日：2006-03-20

Applicant: Michael McCorquodale ,  Scott Pernia ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner

Inventor： Michael McCorquodale ,  Scott Pernia ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner

IPC: H03L7/00

CPC classification number: G06F1/04 ,  G06F1/08 ,  H03B5/06 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1221 ,  H03B5/124 ,  H03B2201/025 ,  H03J1/0008 ,  H03J2200/10 ,  H03L1/00 ,  H03L1/02 ,  H03L1/022 ,  H03L1/025 ,  H03L3/00 ,  H03L7/08 ,  H03L7/0812 ,  H03L7/099 ,  H03L7/183 ,  H03L2207/50

Abstract: In various embodiments, the invention provides a discrete clock generator and/or a timing and frequency reference using an LC-oscillator topology, having a frequency controller to control and provide a stable resonant frequency, which may then be provided to other, second circuitry such as a processor or controller. Frequency stability is provided over variations in a selected parameter such as temperature and fabrication process variations. The various apparatus embodiments include a sensor adapted to provide a signal in response to at least one parameter of a plurality of parameters; and a frequency controller adapted to modify the resonant frequency in response to the second signal. In exemplary embodiments, the sensor is implemented as a current source responsive to temperature fluctuations, and the frequency controller is implemented as a plurality of controlled reactance modules which are selectively couplable to the resonator or to one or more control voltages. The controlled reactance modules may include fixed or variable capacitances or inductances, and may be binary weighted. Arrays of resistive modules are also provided, to generate one or more control voltages.

Abstract translation: 在各种实施例中，本发明提供使用LC振荡器拓扑的离散时钟发生器和/或定时和频率参考，其具有频率控制器来控制和提供稳定的谐振频率，然后可以将其提供给其它第二电路，例如 作为处理器或控制器。 提供了频率稳定性，如选择的参数（如温度和制造工艺变化）的变化。 各种装置实施例包括适于响应于多个参数的至少一个参数提供信号的传感器; 以及频率控制器，其适于响应于所述第二信号来修改所述谐振频率。 在示例性实施例中，响应于温度波动将传感器实现为电流源，并且频率控制器被实现为可选择地耦合到谐振器或一个或多个控制电压的多个受控电抗模块。 受控电抗模块可以包括固定或可变电容或电感，并且可以是二进制加权的。 还提供了电阻模块的阵列，以产生一个或多个控制电压。

公开(公告)号：US20060145775A1

公开(公告)日：2006-07-06

申请号：US11027279

申请日：2004-12-30

Applicant: Ning Zhang ,  William McFarland ,  Mike Galles

Inventor： Ning Zhang ,  William McFarland ,  Mike Galles

IPC: H03B5/32

CPC classification number: H03L1/025 ,  H03L1/028

Abstract: A method and system for pulling a crystal frequency are provided, thereby allowing wireless stations to use less accurate crystal oscillators and dramatically reduce cost. A first frequency offset can be determined using a temperature-based method. This temperature-base method can include detecting a temperature substantially that of the crystal oscillator and then using that temperature to determine the first frequency offset. A second frequency offset using a closed loop frequency estimate-based method can also be determined. This frequency estimate-based method can include synchronizing the crystal frequency to a presumed, accurate frequency of a controlling device to determine the second frequency offset. Both the first and second frequency offsets can be used to pull the crystal frequency. A synthesizer can also be pulled to fine tune a carrier frequency derived from the crystal frequency.

公开(公告)号：US20020149435A1

公开(公告)日：2002-10-17

申请号：US10145976

申请日：2002-05-14

Inventor： David J. Babcock

IPC: H03B005/32

CPC classification number: H03L7/18 ,  H03L1/025

Abstract: A system and method for programming a digitally tunable oscillator is provided. A desired output frequency is received. A tuning effect of a set of digital tuning words on a crystal resonant frequency is determined, and valid parameters of an algorithm for translating and tuning the crystal resonant frequency to a value within an error tolerance of the desired frequency, based on the determined tuning effect are calculated. Valid parameters are preferably calculated based on an intermediate tuning value, sorted by ascending divide parameter of the algorithm, and then evaluated in sorted order for ability of a tuning effect to null frequency error to within the error tolerance. The valid set of calculated parameters are then programmed into a nonvolatile memory. The oscillator control parameters may remain unprogrammed until all necessary parameters are defined. Because the device may be programmed in a single step, without intermediate presumption of nominal crystal frequency, the final plate process may be unnecessary. A high accuracy may be obtained by searching through the complete set of available parameters for a set that meets a frequency and tolerance specification. The oscillator is preferably a Cypress CY2037 device alone or in combination with a Micro Analog Systems MAS1175 device.

Abstract translation: 提供了一种用于编程数字可调谐振荡器的系统和方法。 接收期望的输出频率。 确定一组数字调谐字对晶体谐振频率的调谐效应，以及基于所确定的调谐效应，将用于将晶体谐振频率转换和调谐到所需频率的误差容限内的值的算法的有效参数 被计算。 优选地，根据算法的上升除法参数对中间调整值进行有效参数的计算，然后按照排序顺序对调谐效应的零频率误差进行误差容限的评估。 然后将有效的计算参数集编程到非易失性存储器中。 振荡器控制参数可能保持未编程，直到定义了所有必要的参数。 因为可以在单个步骤中编程器件，而不会中间推定额定晶体频率，所以最终的板工艺可能是不必要的。 通过搜索满足频率和公差规范的一组的可用参数的完整集合可以获得高精度。 该振荡器优选地是单独的Cypress CY2037器件或与Micro Analog Systems MAS1175器件的组合。

公开(公告)号：US6052036A

公开(公告)日：2000-04-18

申请号：US962480

申请日：1997-10-31

Applicant: H.ang.kan Enstrom ,  Erik Bengtsson ,  Torbjorn Gardenfors

Inventor： H.ang.kan Enstrom ,  Erik Bengtsson ,  Torbjorn Gardenfors

IPC: H03B5/32 ,  H03B5/04 ,  H03B5/36 ,  H03L1/02 ,  H03L5/00 ,  H03B5/30 ,  H03L1/00

CPC classification number: H03L5/00 ,  H03B5/368 ,  H03L1/025

Abstract: A highly stable single chip crystal controlled oscillator with automatic gain control. An amplitude detector monitors the output of a crystal controlled oscillator amplifier and produces a feedback signal proportional to the output signal of the amplifier to ensure oscillation is induced at startup and that the amplitude of oscillation is limited to a preselected value during operation to conserve power consumption by the amplifier. The capacitor tank circuit connected to the input of the amplifier includes a voltage variable capacitor the voltage across which is initially established at manufacture to tune the oscillation frequency to a preselected value. The voltage across the voltage variable capacitor is also adjusted to compensate for temperature variations in the circuit.

Abstract translation: 高度稳定的单芯片晶体振荡器，具有自动增益控制。 振幅检测器监测晶体振荡器放大器的输出，并产生与放大器的输出信号成比例的反馈信号，以确保在启动时产生振荡，振荡幅度在操作期间被限制为预选值以节省功耗 由放大器。 连接到放大器的输入端的电容器谐振电路包括电压可​​变电容器，其最初在制造时建立的电压，以将振荡频率调谐到预选值。 电压可变电容器两端的电压也被调整以补偿电路中的温度变化。

公开(公告)号：US5875388A

公开(公告)日：1999-02-23

申请号：US896697

申请日：1997-07-18

Applicant: Earl A. Daughtry, Jr. ,  Christopher S. Quire ,  Mark A. Ruff ,  Richard M. Stone

Inventor： Earl A. Daughtry, Jr. ,  Christopher S. Quire ,  Mark A. Ruff ,  Richard M. Stone

IPC: H03B5/32 ,  H03J1/00 ,  H03J7/06 ,  H03L1/00 ,  H03L1/02 ,  H04B1/26 ,  H04W4/18 ,  H04W28/04 ,  H04W88/02 ,  H04B1/16

CPC classification number: H04B1/26 ,  H03B5/32 ,  H03J1/0033 ,  H03J7/06 ,  H03L1/00 ,  H03L1/025 ,  H04W4/18 ,  H04W88/02

Abstract: A method and an apparatus for compensating for aging and temperature of the crystal in a crystal oscillator. An RF signal which is transmitted by a mobile telephone switching office (MTSO) (108) and received by the antenna (118). The signal transmitted by the MTSO (108) serves as an external reference. A crystal-controlled main oscillator/time base generator (134) provides a local reference frequency to the converters (120) and provides a time base signal to a counter (136). A controller (112) reads an aging correction value from a memory and provides a frequency control signal to the main oscillator (134). The converters (120) convert the received RF signal to an IF frequency. A limiter (122) provides a limited IF signal to the counter (136). Counter (136) counts the number of cycles of the limited IF signal that appear in a cycle of the time base signal. A controller (112) compares this measured count to a reference count and the count error is determined. The count error is compared to an allowable count error. If the count error is excessive then the controller (112) adjusts the frequency control signal provided to the main oscillator (134) so as to change the frequency of the main oscillator (134). Once the controller (112) has shifted the frequency so that the count error is not excessive then the controller (112) stores the new aging correction value. The measured count is therefore depends upon the frequency of the main oscillator (134) and the frequency of the received signal. This process automatically compensates for the frequency of the main oscillator (134) and, therefore, for aging of the crystal. The frequency of oscillation of the main oscillator (134) is therefore as accurate as the external reference, typically the highly accurate MTSO (108). A high precision oscillator (134) has thus been obtained using an external reference (MTSO 108) and an aging correction value.

公开(公告)号：US5777524A

公开(公告)日：1998-07-07

申请号：US901892

申请日：1997-07-29

Applicant: Carl E. Wojewoda ,  James F. Caruba ,  Richard N. Sutliff

Inventor： Carl E. Wojewoda ,  James F. Caruba ,  Richard N. Sutliff

IPC: H03B5/36 ,  H03J7/12 ,  H03L1/02 ,  H04B1/40 ,  H03L5/00

CPC classification number: H03J7/12 ,  H03B5/368 ,  H03L1/025 ,  H04B1/40 ,  H03L1/028

Abstract: A temperature compensation circuit (10) for a crystal oscillator module (12) used in a communication device (200). An existing microcontroller (210) of the communication device (200) is used to provide temperature compensating digital data (30) for a crystal oscillator (18). The temperature compensating digital data (30) is converted to a temperature compensation signal (22) in a digital-to-analog converter (32) which controls the crystal oscillator frequency. The crystal oscillator module (12) includes an onboard voltage regulator (34) which supplies a characterized regulated voltage (36) to the digital-to-analog converter (32) such that the temperature compensation signal (22) from the digital-to-analog converter (32) is inherently corrected for voltage variations in the voltage regulator (34). Changes in the temperature compensation of the crystal oscillator (18) are allowed only when the communication device (200) is not transmitting or receiving.

Abstract translation: 一种在通信设备（200）中使用的用于晶体振荡器模块（12）的温度补偿电路（10）。 通信设备（200）的现有微控制器（210）用于为晶体振荡器（18）提供温度补偿数字数据（30）。 温度补偿数字数据（30）被转换成控制晶体振荡器频率的数/模转换器（32）中的温度补偿信号（22）。 晶体振荡器模块（12）包括一个板载电压调节器（34），其向数模转换器（32）提供表征的调节电压（36），使得来自数模转换器（32）的温度补偿信号（22） 模拟转换器（32）固有地被校正为电压调节器（34）中的电压变化。 仅当通信装置（200）不发送或接收时，允许晶体振荡器（18）的温度补偿的变化。