| 摘要 |
PROBLEM TO BE SOLVED: To reduce a slew rate on the transition edges of a digital signal on a node of an integrated circuit. SOLUTION: A number of switchably conductive devices such as FETs each characterized by a different threshold voltage are connected in parallel between a transmission line node such as an output pad and a voltage source. Each conductive device is controllable at a respective switch using a common driving signal. Accordingly, when the driving signal transitions from one digital state to another, the conductive devices will each turn on or off (depending on the direction of the signal transition) in turn to generate a stepped control of the slew rate of the signal edge on the node.
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