| 摘要 |
A pre-emphasis circuit and methods are provided. The circuit includes a first amplifier and a second amplifier. The first amplifier contains M first driver cells and is operable to amplify a signal. The second amplifier contains P second driver cells and is operable to amplify a delayed version of the signal The pre-emphasis circuit further includes logic circuit operable to change a pre-emphasis ratio of the pre-emphasis circuit including switching off one or more of the M first driver cells of the first amplifier and switching on a corresponding one or more of the P second driver cells of the second amplifier, such that a swing amplitude for an output signal provided by the pre-emphasis circuit is maintained at a constant level.
|
