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AssigneeRealtek Semiconductor Corp.
InventorsCHENG-PANG CHAN, CHIEN-MING WU, LIANG-HUAN LEI, JIAN-RU LIN
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An impedance calibration device provided includes a timing device, a first transmitter, a first variable resistor, a second variable resistor and a first receiver. The first variable resistor is used to receive a first adjustment code. The second variable resistor is used to receive a second adjustment code. The first receiver generates a first contact digital signal according to a first contact voltage. The first receiver generates a first terminate digital signal according to a first terminate voltage and the first adjustment code. The first receiver generates a first load digital signal according to a load voltage and the second adjustment. The timing device dynamically adjust the first adjustment code and the second adjustment code according to the first contact digital signal, the first terminate digital signal and the first load digital signal.
An impedance calibration device having a timing device, a first channel, a first switch, a first contact resistor and a load resistor, the timing device being coupled to the first channel, the load resistor having an end coupled to an end of the first switch, the load resistor having an uncoupled end connected to ground, the first switch having an uncoupled end coupled to an end of the first contact resistor and the first switch having a load voltage, the impedance calibration device comprising:
An impedance calibration method used for a impedance calibration device having a first channel, the impedance calibration device including a timing device, a first receiver, a first variable resistor, a second variable resistor, a first contact resistor, a load resistor and a first transmitter, the first variable resistor being used to receive a first adjustment code, the second variable resistor being used to receive a second adjustment code, the first receiver having a first input terminal, a second input terminal, a third input terminal and a first output terminal, the timing device being coupled to the first channel, the first input terminal being coupled to an end of a second switch, the second switch having an uncoupled end connected to a first terminate voltage, the second input terminal being coupled to an end of a third switch, the third switch having an uncoupled end connected to the first contact voltage, the third input terminal being coupled to an end of a fourth switch, the impedance calibration method comprising:
Dependencies are inferred from the claim text.