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    Local oscillator with injection pulling suppression and spurious products filtering
    1.
    发明公开
    Local oscillator with injection pulling suppression and spurious products filtering 有权
    Lokaloszillator mitUnterdrückungdes Mitziehens der Frequenz undStörsignalfilterung

    公开(公告)号：EP1775843A1

    公开(公告)日：2007-04-18

    申请号：EP06255210.4

    申请日：2006-10-10

    申请人： STMicroelectronics, Inc.

    发明人： Krivokapic, Ivan ,  Divel, Thierry

    IPC分类号： H04B1/04 ,  H03B21/02 ,  H03H17/02 ,  H03B1/04 ,  H03L7/107 ,  H03L7/185

    CPC分类号： H03L7/099 ,  H03B21/01 ,  H03D7/165 ,  H03J3/08 ,  H03L7/0805 ,  H03L7/107 ,  H03L7/18 ,  H03L7/185 ,  H04B1/30

    摘要： A single sideband mixer circuit includes a voltage controlled oscillator operable to provide a tunable frequency f1. The mixer circuit outputs a frequency signal at a frequency f1 ± f2. A tracking filter operates to filter the frequency signal and generate a first output signal at the frequency f1 ± f2. A resonance frequency fr of the tracking filter is tunable to substantially match the frequency f1 ± f2 of the frequency signal. The output signal of the tracking filter may be processed by a phase lock loop circuit to generate a control signal for controlling the setting of the tunable frequency f1 and resonance frequency fr. Alternatively, the output signal of the tracking filter may be divided and the divided signal processed by a phase lock loop circuit to generate the control signal for controlling setting of the tunable frequency f1 and resonance frequency fr.

    摘要翻译： 单个边带混频器电路包括可操作以提供可调谐频率f1的压控振荡器。 混频器电路以f1±f2的频率输出频率信号。 跟踪滤波器用于对频率信号进行滤波并产生频率为f1±f2的第一输出信号。 跟踪滤波器的谐振频率fr可调，以使频率信号的频率f1±f2基本匹配。 跟踪滤波器的输出信号可以由锁相环电路来处理，以产生用于控制可调频率f1和谐振频率fr的设置的控制信号。 或者，跟踪滤波器的输出信号可以被分频，并且由锁相环电路处理的分频信号产生用于控制可调谐频率f1和谐振频率fr的设置的控制信号。