| 摘要 |
Various embodiments of an impedance calibration circuit are disclosed. In one exemplary embodiment, the impedance calibration circuit may include a control unit configured to generate a plurality of first internal commands for defining an impedance calibration operation in response to an external signal, a temperature-adaptive control unit configured to generate a second internal command for defining an impedance calibration operation by detecting a temperature change, a timer counter configured to generate an operation control signal that prescribes a duration of time for an impedance calibration operation in response to the plurality of first internal commands and the second internal command, and an impedance calibration signal generation unit configured to operate for a predetermined time defined by the operation control signal and generate impedance calibration signals.
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