| 摘要 |
PURPOSE: An output buffer is provided to implement a de-emphasis function by reducing driving power for pulling up output data. CONSTITUTION: A pull-up free driver generates a pull-up signal which is enabled in response to a pull-up code by receiving first internal data. A pull-down free driver(12) generates a pull-down signal which is enabled in response to a pull-down code by receiving the first internal data. A free driver(14) generates a pull-down emphasis signal which is enabled in response to an enable signal by receiving second inner data. A pull-up driver(15) pulls up the output data outputted to an output pad in response to a pull-up signal. The pull-down driver pulls down the output data in response to a pull-down signal and a pull-down emphasis signal. |
