更进一步，控制器可以被耦合以接收对应于可变阻抗位准的控制信号，并响应于所述控制信 号来控制耦合到混频器的本机振荡器。
Still further, a controller may be coupled to receive a control signalcorresponding to a variable impedance level, and control a local oscillator coupled to the mixer responsive to the control signal.
更进一步，控制器可以被耦合以接收对应于可变阻抗位准的控制信号，并响应于所述控制信 号来控制耦合到混频器的本机振荡器。
Still further, a controller may be coupled to receive a control signalcorresponding to a variable impedance level, and control a local oscillator coupled to the mixer responsive to the control signal.
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