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    • 5. 发明申请
    • Signal conditioning circuit
    • 信号调理电路
    • US20050113056A1
    • 2005-05-26
    • US10947963
    • 2004-09-23
    • Dietolf SeippelAndre HankeDuyen Pham-Stabner
    • Dietolf SeippelAndre HankeDuyen Pham-Stabner
    • H03B27/00H03K21/00H04N9/77H04N9/79H04N17/00
    • H03B27/00
    • A signal conditioning circuit contains an oscillator which is connected to the inputs of two mixers. The output of one mixer is coupled, so as to form a feedback path, to a frequency divider circuit whose first output is coupled to the second input of the first mixer. A second signal output of the frequency divider circuit carries a signal with a phase shift of 90 degrees with respect to the signal at the first signal output of the frequency divider circuit. The second signal is supplied to a second input of the second mixer. Feedback results in undesirable signal components in the in-phase and quadrature components being suppressed. At the same time, the in-phase and quadrature components have a fixed phase relationship with respect to one another. The signal conditioning circuit allows desired non-integer division ratios to be achieved.
    • 信号调理电路包含连接到两个混频器输入端的振荡器。 将一个混频器的输出端耦合到一个分频器电路,以形成一个反馈路径,该分频器电路的第一个输出耦合到第一个混频器的第二个输入端。 分频器电路的第二信号输出相对于分频器电路的第一信号输出处的信号携带相对于90度的相移的信号。 第二信号被提供给第二混频器的第二输入端。 反馈导致同相和正交分量中不期望的信号分量被抑制。 同时,同相和正交分量相对于彼此具有固定的相位关系。 信号调理电路允许实现期望的非整数分频比。