Radio-frequency transceiver and radio-frequency local oscillator leakage inhibition apparatus thereof

Radio-frequency transceiver and radio-frequency local oscillator leakage inhibition apparatus thereof

  • CN 104,883,203 A
  • Filed: 06/09/2015
  • Published: 09/02/2015
  • Est. Priority Date: 06/09/2015
  • Status: Active Application
First Claim
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1. the radio-frequency (RF) local oscillator of radio frequency transceiver reveals a restraining device, it is characterized in that, comprises signal amplitude detection circuit, controller and DC shift adjusting part;

  • Described DC shift adjusting part is arranged at the digital baseband of radio frequency transceiver, and described controller connects described signal amplitude detection circuit and DC shift adjusting part;

    Described controller exports DC shift level to described digital baseband for controlling DC shift adjusting part, and the amplitude of described DC shift level is successively decreased to the reverse maximum preset by the forward maximum preset by default step-length;

    Described signal amplitude detection circuit carries out being converted to DC level for receiving local oscillator leakage signals and exports the first level signal when the amplitude of described DC level is more than or equal to the amplitude of benchmark DC level to described controller, exports second electrical level signal to described controller when the amplitude of described DC level is less than the amplitude of benchmark DC level;

    Described controller obtains correspondence and is delivered to the amplitude of the DC shift level of digital baseband and calculates DC shift value when the level signal generation saltus step that described signal amplitude detection circuit exports, described controller controls described DC shift adjusting part according to described DC shift value and carries out local oscillator leakage suppression process.

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