Correcting for phase noise of an oscillator
    1.
    发明授权
    Correcting for phase noise of an oscillator 有权
    校正振荡器的相位噪声

    公开(公告)号:US08126420B2

    公开(公告)日:2012-02-28

    申请号:US12005513

    申请日:2007-12-27

    IPC分类号: H04B1/10

    CPC分类号: H04B1/10 H04B1/28

    摘要: In one embodiment, the present invention includes a method for digitizing a phase noise value indicative of a level of phase noise present in a LO signal and downconverting an RF signal to a second frequency signal using the LO signal. This downconversion can cause the phase noise to be transferred to the second frequency signal. The method may thus further include removing the phase noise from the second frequency signal using the digitized phase noise value.

    摘要翻译: 在一个实施例中,本发明包括一种数字化表示LO信号中存在的相位噪声电平的相位噪声值并使用LO信号将RF信号下变频为第二频率信号的方法。 该下变频可导致相位噪声被传送到第二频率信号。 因此,该方法可以进一步包括使用数字化相位噪声值从第二频率信号中去除相位噪声。

    Correcting for phase noise of an oscillator
    2.
    发明申请
    Correcting for phase noise of an oscillator 有权
    校正振荡器的相位噪声

    公开(公告)号:US20090170463A1

    公开(公告)日:2009-07-02

    申请号:US12005513

    申请日:2007-12-27

    IPC分类号: H04B1/10

    CPC分类号: H04B1/10 H04B1/28

    摘要: In one embodiment, the present invention includes a method for digitizing a phase noise value indicative of a level of phase noise present in a LO signal and downconverting an RF signal to a second frequency signal using the LO signal. This downconversion can cause the phase noise to be transferred to the second frequency signal. The method may thus further include removing the phase noise from the second frequency signal using the digitized phase noise value.

    摘要翻译: 在一个实施例中,本发明包括一种数字化表示LO信号中存在的相位噪声电平的相位噪声值并使用LO信号将RF信号下变频为第二频率信号的方法。 该下变频可导致相位噪声被传送到第二频率信号。 因此,该方法可以进一步包括使用数字化相位噪声值从第二频率信号中去除相位噪声。

    Mechanism for controlling amplifier gain in a radio receiver
    5.
    发明申请
    Mechanism for controlling amplifier gain in a radio receiver 失效
    控制无线电接收机放大器增益的机制

    公开(公告)号:US20080160947A1

    公开(公告)日:2008-07-03

    申请号:US11648413

    申请日:2006-12-29

    IPC分类号: H04B1/06

    CPC分类号: H03G3/3068

    摘要: A radio receiver such as a frequency modulation (FM) receiver, for example, includes a radio frequency (RF) amplifier having an adjustable gain output. The RF amplifier may be configured to receive and amplify an incoming RF signal. The receiver also includes an intermediate frequency (IF) amplifier having an adjustable gain output. The IF amplifier may be configured to receive and amplify an IF signal that corresponds to the RF signal. The receiver also includes a gain control unit that is coupled to the RF amplifier and the IF amplifier. The gain control unit may be configured to independently adjust the gain of each of the RF amplifier and the IF amplifier, dependent upon a peak output level of both the RF amplifier and the IF amplifier.

    摘要翻译: 诸如调频(FM)接收机的无线电接收机例如包括具有可调增益输出的射频(RF)放大器。 RF放大器可以被配置为接收和放大输入RF信号。 接收机还包括具有可调增益输出的中频(IF)放大器。 IF放大器可以被配置为接收和放大对应于RF信号的IF信号。 接收机还包括耦合到RF放大器和IF放大器的增益控制单元。 增益控制单元可以被配置为根据RF放大器和IF放大器的峰值输出电平独立地调节每个RF放大器和IF放大器的增益。

    Mechanism for controlling amplifier gain in a radio receiver
    6.
    发明授权
    Mechanism for controlling amplifier gain in a radio receiver 失效
    控制无线电接收机放大器增益的机制

    公开(公告)号:US07890075B2

    公开(公告)日:2011-02-15

    申请号:US11648413

    申请日:2006-12-29

    IPC分类号: H04B1/06

    CPC分类号: H03G3/3068

    摘要: A radio receiver such as a frequency modulation (FM) receiver, for example, includes a radio frequency (RF) amplifier having an adjustable gain output. The RF amplifier may be configured to receive and amplify an incoming RF signal. The receiver also includes an intermediate frequency (IF) amplifier having an adjustable gain output. The IF amplifier may be configured to receive and amplify an IF signal that corresponds to the RF signal. The receiver also includes a gain control unit that is coupled to the RF amplifier and the IF amplifier. The gain control unit may be configured to independently adjust the gain of each of the RF amplifier and the IF amplifier, dependent upon a peak output level of both the RF amplifier and the IF amplifier.

    摘要翻译: 诸如调频(FM)接收机的无线电接收机例如包括具有可调增益输出的射频(RF)放大器。 RF放大器可以被配置为接收和放大输入RF信号。 接收机还包括具有可调增益输出的中频(IF)放大器。 IF放大器可以被配置为接收和放大对应于RF信号的IF信号。 接收机还包括耦合到RF放大器和IF放大器的增益控制单元。 增益控制单元可以被配置为独立地调节每个RF放大器和IF放大器的增益,这取决于RF放大器和IF放大器的峰值输出电平。

    Dynamic selection of local oscillator signal injection for image rejection in integrated receivers
    10.
    发明授权
    Dynamic selection of local oscillator signal injection for image rejection in integrated receivers 有权
    动态选择本地振荡器信号注入用于集成接收机中的图像抑制

    公开(公告)号:US07272374B2

    公开(公告)日:2007-09-18

    申请号:US10881579

    申请日:2004-06-30

    IPC分类号: H04B1/28

    CPC分类号: H04B1/10 H03J1/0041 H04B1/28

    摘要: A system and method are disclosed for dynamically selecting high-side injection or low-side injection of local oscillator mixing signals based upon an assessment of signal power within the input signal spectrum that could cause unwanted images in the processed signal. This image rejection assessment provides an advantageous basis upon which to make dynamic high-side versus low-side injection determinations.

    摘要翻译: 公开了一种系统和方法,用于基于对输入信号频谱内的信号功率的评估来动态地选择本地振荡器混合信号的高侧注入或低侧注入,这可能导致处理信号中的不需要的图像。 这种镜像抑制评估提供了进行动态高侧对低侧注射测定的有利基础。