| 摘要 |
A driver for providing binary signals from a data system to a transmission line is disclosed. The driver includes a first field-effect transistor (FET) coupled between an output node and ground for conducting current from the output node to ground. The output node is connectable to the transmission line. An initial charging stage provides an initial charging current to the gate of the first FET for a period of time not to exceed an initial charging time period. The initial charging time period has a length approximately equal to a period of time necessary to increase the gate voltage of the first FET from ground to the threshold voltage of the first FET. A main charging stage provides a main charging current to the gate of the first FET for a period of time not to exceed a main charging time period. A discharging stage provides a discharging current from the gate of the first FET to ground. Finally, a temperature compensation circuit is coupled to the initial charging stage, the main charging stage, and the discharging stage for adjusting the level of the initial charging current, the main charging current, and the discharging current to compensate for variations in temperature and for controlling the length of the main charging time period.
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