| 摘要 |
<p>PURPOSE: An impedance tuning circuit and an integrated circuit including the same are provided to use an initial pull-up code and an initial pull-down code that are generated during an initial impedance tuning operation, in a subsequent impedance tuning operation, thereby reducing an impedance tuning time of the subsequent impedance tuning operation. CONSTITUTION: An impedance tuning circuit (100) comprises a calibration unit (110) and a post-processing unit (130). The calibration unit generates an initial pull-up code and an initial pull-down code by performing a calibration operation using an external resistor during an initial impedance tuning operation. The calibration unit is coupled to the external resistor. The post-processing unit outputs the initial pull-up code and the initial pull-down code as a final pull-up code and a final pull-down code during the initial impedance tuning operation, and generates the final pull-up code and the final pull-down code by using the initial pull-up code and the initial pull-down code during a subsequent impedance tuning operation. The post-processing unit is coupled to an output driver (200).</p> |
