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On-die impedance calibration

  • US 10,224,928 B1
  • Filed: 03/23/2018
  • Issued: 03/05/2019
  • Est. Priority Date: 03/23/2018
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a calibration circuit that determines a digital compensation value for an input/output driver;

    a calibration adjustment circuit that provides the digital compensation value to the calibration circuit to produce an analog output corresponding to the digital compensation value; and

    a feedback circuit that provides the analog output as feedback to the calibration circuit to produce an analog compensation value.

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