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    Low intermediate frequency receiver
    1.
    发明授权
    Low intermediate frequency receiver 有权
    低中频接收机

    公开(公告)号：US09391578B2

    公开(公告)日：2016-07-12

    申请号：US14302223

    申请日：2014-06-11

    Applicant: ANALOG DEVICES GLOBAL

    Inventor： Muhammad Kalimuddin Khan ,  Michael J. Deeney ,  Niall Kevin Kearney ,  Kenneth J. Mulvaney ,  Shane A. O'Mahony

    IPC: H04B1/38 ,  H03G3/30 ,  H04B1/30

    CPC classification number: H03G3/3052 ,  H03G3/3068 ,  H04B1/30 ,  H04B2001/305

    Abstract: An LIF receiver includes a receiver path comprising: a mixer for mixing a received RF signal with a local oscillator signal to provide an IF signal at a lower frequency than the received RF signal, a bandpass filter for filtering the IF signal, a PGA for amplifying the filtered IF signal, an ADC for converting the amplified filtered IF signal to a digital signal, a converter for converting the digital signal to a baseband digital signal, and an AGC for setting a gain of the PGA in response to a magnitude of the received RF signal. A programmable DC signal source injects a programmed DC offset signal into the amplified filtered IF signal converted by the ADC, and a signal sensor, operatively connected to the receiver path after the PGA, determines a polarity of PGA signal output for a programmed DC offset signal. A controller determines a programmed DC offset signal minimizing a magnitude of the baseband signal in the absence of a received RF signal for at least one gain setting of the PGA.

    Abstract translation: LIF接收机包括：接收机路径，包括：混合器，用于将接收到的RF信号与本地振荡器信号混合，以提供比所接收的RF信号低的频率的IF信号;滤波IF信号的带通滤波器;用于放大的PGA 经滤波的IF信号，用于将放大的滤波IF信号转换为数字信号的ADC，用于将数字信号转换为基带数字信号的转换器，以及响应于接收到的幅度的设定PGA的增益的AGC 射频信号。 可编程DC信号源将经编程的DC偏移信号注入由ADC转换的经放大的经滤波的IF信号中，并且在PGA之后可操作地连接到接收器路径的信号传感器确定编程的DC偏移信号的PGA信号输出的极性 。 控制器确定在没有接收的RF信号的情况下使PGA的至少一个增益设置最小化基带信号幅度的编程的DC偏移信号。

    LOW INTERMEDIATE FREQUENCY RECEIVER
    3.
    发明申请
    LOW INTERMEDIATE FREQUENCY RECEIVER 有权
    低频中频接收机

    公开(公告)号：US20150365118A1

    公开(公告)日：2015-12-17

    申请号：US14302223

    申请日：2014-06-11

    Applicant: ANALOG DEVICES GLOBAL

    Inventor： Muhammad Kalimuddin Khan ,  Michael J. Deeney ,  Niall Kevin Kearney ,  Kenneth J. Mulvaney ,  Shane A. O'Mahony

    IPC: H04B1/16 ,  H03G3/30 ,  H04B1/40

    CPC classification number: H03G3/3052 ,  H03G3/3068 ,  H04B1/30 ,  H04B2001/305

    Abstract: An LIF receiver includes a receiver path comprising: a mixer for mixing a received RF signal with a local oscillator signal to provide an IF signal at a lower frequency than the received RF signal, a bandpass filter for filtering the IF signal, a PGA for amplifying the filtered IF signal, an ADC for converting the amplified filtered IF signal to a digital signal, a converter for converting the digital signal to a baseband digital signal, and an AGC for setting a gain of the PGA in response to a magnitude of the received RF signal. A programmable DC signal source injects a programmed DC offset signal into the amplified filtered IF signal converted by the ADC, and a signal sensor, operatively connected to the receiver path after the PGA, determines a polarity of PGA signal output for a programmed DC offset signal. A controller determines a programmed DC offset signal minimizing a magnitude of the baseband signal in the absence of a received RF signal for at least one gain setting of the PGA.

    Abstract translation: LIF接收机包括：接收机路径，包括：混合器，用于将接收到的RF信号与本地振荡器信号混合，以提供比所接收的RF信号低的频率的IF信号;滤波IF信号的带通滤波器;用于放大的PGA 经滤波的IF信号，用于将放大的滤波IF信号转换为数字信号的ADC，用于将数字信号转换为基带数字信号的转换器，以及响应于接收到的幅度的设定PGA的增益的AGC RF信号。 可编程DC信号源将经编程的DC偏移信号注入由ADC转换的经放大的经滤波的IF信号中，并且在PGA之后可操作地连接到接收器路径的信号传感器确定编程的DC偏移信号的PGA信号输出的极性 。 控制器确定在没有接收的RF信号的情况下使PGA的至少一个增益设置最小化基带信号幅度的编程的DC偏移信号。

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