By distortion trsanscondutor is carried out linearizing method and apparatus

By distortion trsanscondutor is carried out linearizing method and apparatus

  • CN 101,663,812 A
  • Filed: 04/17/2008
  • Published: 03/03/2010
  • Est. Priority Date: 04/18/2007
  • Status: Active Application
First Claim
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1. feedback transconductor circuit comprises:

  • The output trsanscondutor has the control input end and in response to the output of the signal at place, described control input end, andPredistortion circuit comprises;

    The control input end,Model transconductor, has input voltage-output current characteristic, wherein, described output current is relevant with the output current of described output trsanscondutor with constant coefficients, described constant coefficients comprises a multiplying factor, and described model transconductor has the control input end and in response to the output of the signal of the control input end at described model transconductor placeFeedback networkBe connected signal with the place, control input end that receives to described predistortion circuit,Has feedback circuit, be connected to receive the feedback signal of expression from the signal of the output output of described model transconductor, and has the control output end, be connected the control input end that is supplied to the control input end of described model transconductor and is supplied to described output trsanscondutor with the trsanscondutor control signal, andIn response to described feedback signal from described control input end to the signal of described predistortion circuit and expression from the signal of the output output of described model transconductor, in described trsanscondutor control signal is provided, the output of described model transconductor is controlled to be linear with respect to the signal at the place, control input end of described predistortion circuit.

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