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    ADJUSTABLE FREQUENCY STABILIZING INTERNAL CHIP CAPACITOR SYSTEM
    71.
    发明公开
    ADJUSTABLE FREQUENCY STABILIZING INTERNAL CHIP CAPACITOR SYSTEM 有权
    可调，稳频，片内电容器装置

    公开(公告)号：EP0985266A1

    公开(公告)日：2000-03-15

    申请号：EP99912935.6

    申请日：1999-03-24

    Applicant: MICROCHIP TECHNOLOGY INC.

    Inventor： BRUWER, Frederick ,  SMIT, Willem

    IPC: H03B5/20

    CPC classification number: H03B5/20 ,  H03B2201/02 ,  H03B2201/025 ,  H03B2201/0266 ,  H03J2200/10 ,  Y10T307/826

    Abstract: A transmitter system comprises an oscillator and having an adjustable monolithic capacitor circuit used for frequency stabilization. The oscillator signal is modulated and transmitted. A data generating chip is coupled to the transmitter. The data generating chip is used for adjusting and controlling the transmitter oscillator frequency signal. The adjustable capacitor circuit is located internal to the data generating chip and is coupled to a ground pin and one of a plurality of function pins on the data generating chip. The adjustable capacitor circuit is used for adjusting and setting the centerpoint of the transmitter oscillator frequency signal.

    SYSTEM FOR CONTROLLING THE FREQUENCY OF AN OSCILLATOR
    78.
    发明公开
    SYSTEM FOR CONTROLLING THE FREQUENCY OF AN OSCILLATOR 有权
    用于控制振荡器频率的系统

    公开(公告)号：EP1374387A1

    公开(公告)日：2004-01-02

    申请号：EP02721582.1

    申请日：2002-03-25

    Applicant: Conexant Systems, Inc.

    Inventor： DAMGAARD, Morten ,  DOMINO, William, J. ,  MAGOON, Rahul ,  MOLNAR, Alyosha, C. ,  ZACHAN, Jeff

    IPC: H03D3/24 ,  H04L27/06 ,  H04L25/49 ,  H03L7/00 ,  H03L7/06 ,  H04B1/18 ,  H04B1/06 ,  H04B1/26

    CPC classification number: H03L7/099 ,  H03B2201/025 ,  H03B2201/0291 ,  H03J2200/10 ,  H03L5/00 ,  H03L7/087 ,  H03L7/113

    Abstract: Systems for controlling the frequency of the output signal of a controllable oscillator (202) in a frequency synthesizer (200) are provided. One such system comprises a controllable oscillator (202) and a frequency control circuit (208). The controllable oscillator (202) is configured to generate an output signal that has a predefined frequency. The controllable oscillator (202) is also configured with a plurality of operational states that are controlled by the frequency control circuit (208). Each operational state of the controllable oscillator (202) defines a distinct frequency for the output signal of the controllable oscillator (202). The frequency control circuit (208) receives the output signal of the controllable oscillator (202) and determines the distinct frequency for the output signal that best approximates the predefined frequency. The frequency control circuit (208) may also provide a control signal to the controllable oscillator (202) that is configured to change the controllable oscillator (202) to the operational state corresponding to the distinct frequency that best approximates the predefined frequency.

    Abstract translation: 提供了用于控制频率合成器（200）中的可控振荡器（202）的输出信号的频率的系统。 一个这样的系统包括可控振荡器（202）和频率控制电路（208）。 可控振荡器（202）被配置为生成具有预定频率的输出信号。 可控振荡器（202）还配置有多个由频率控制电路（208）控制的操作状态。 可控振荡器（202）的每个操作状态为可控振荡器（202）的输出信号定义不同的频率。 频率控制电路（208）接收可控振荡器（202）的输出信号并确定最接近预定频率的输出信号的不同频率。 频率控制电路（208）还可以向可控振荡器（202）提供控制信号，该控制信号被配置为将可控振荡器（202）改变为对应于最接近预定频率的不同频率的操作状态。

    Radio frequency integrated circuit
    79.
    发明公开
    Radio frequency integrated circuit 审中-公开
    Integrierte SchaltungfürHochfrequenz

    公开(公告)号：EP1331742A2

    公开(公告)日：2003-07-30

    申请号：EP03001462.5

    申请日：2003-01-22

    Applicant: Broadcom Corporation

    Inventor： Pan, Meng-An ,  Wu, Stephen ,  Ibrahim, Brima B.

    IPC: H04B1/40

    CPC classification number: H04B1/406 ,  H03B2201/025 ,  H03J2200/10 ,  H03L7/0891 ,  H03L7/099 ,  H03L7/10 ,  H03L7/18 ,  H03L7/187 ,  H04B1/30 ,  H04B17/21

    Abstract: A radio frequency (RF) integrated circuit (IC) includes a local oscillation module, analog radio receiver, analog radio transmitter, digital receiver module, digital transmitter module, and digital optimization module. The local oscillation module is operably coupled to produce at least one local oscillation. The analog radio receiver is operably coupled to directly convert inbound RF signals into inbound low intermediate frequency signals based on the local oscillation. The digital receiver module is operably coupled to process the inbound low IF signals in accordance with one of a plurality of radio transceiving standards to produce inbound data. The digital transmitter is operably coupled to produce an outbound low intermediate frequency signal by processing outbound data in accordance with the one of the plurality of radio transceiving standards. The analog radio transmitter is operably coupled to directly convert the outbound low IF signals into outbound RF signals based on the local oscillation. The digital optimization module is operably coupled to the local oscillation module, the analog radio receiver and/or the analog radio transmitter to optimize performance of at least one aspect of the local oscillation module, the analog radio receiver and/or the analog radio transmitter for the given radio transceiving standard being implemented.

    Abstract translation: 射频（RF）集成电路（IC）包括本地振荡模块，模拟无线电接收器，模拟无线电发射机，数字接收机模块，数字发射机模块和数字优化模块。 本地振荡模块可操作地耦合以产生至少一个本地振荡。 模拟无线电接收机可操作地耦合以基于本地振荡将入站RF信号直接转换成入站低中频信号。 数字接收机模块可操作地耦合以根据多个无线电收发标准之一来处理入站低IF信号以产生入站数据。 数字发射机可操作地耦合以通过根据多个无线电收发标准之一处理出站数据来产生出站低中频信号。 模拟无线电发射机可操作地耦合以基于本地振荡将出站低IF信号直接转换成出站RF信号。 数字优化模块可操作地耦合到本地振荡模块，模拟无线电接收机和/或模拟无线电发射机，以优化本地振荡模块，模拟无线电接收机和/或模拟无线电发射机的至少一个方面的性能， 给定的无线电收发标准正在实施。

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