A kind of output impedance adjusting method, chip and mobile terminal

A kind of output impedance adjusting method, chip and mobile terminal

  • CN 107,832,245 A
  • Filed: 11/10/2017
  • Published: 03/23/2018
  • Est. Priority Date: 11/10/2017
  • Status: Active Application
First Claim
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1. a kind of output impedance adjusting method, applied to chip, it is characterised in that the drive circuit in the chip passes through connectionLink is connected with another chip, and the drive circuit has at least two output impedances, and methods described includes:

  • Control the drive circuit and test signal is exported with each output impedance at least two output impedance respectively;

    Obtain by each test signal and the superposed signal formed is superimposed based on the reflected signal that each test signal returns;

    Calculate the difference of the amplitude of waveform corresponding to each superposed signal and default amplitude;

    From the difference corresponding to each test signal, the minimum target difference of absolute value is chosen;

    According to the target difference, target output impedance is determined;

    The operating output impedance of the drive circuit is arranged to the target output impedance;

    Wherein, the target difference is with the difference corresponding to the test signal of target output impedance output.

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