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    • 5. 发明授权
    • Slow speed driver with controlled slew rate
    • 缓速驱动器,具有受控的转换速率
    • US5757217A
    • 1998-05-26
    • US672412
    • 1996-06-28
    • James E. Thompson
    • James E. Thompson
    • H03K19/003H03K17/16H03F3/26H03K6/04
    • H03K19/00361
    • A driver circuit for transmitting data via an output node thereof to a transmission line includes a first driving device coupled to the output node and a second driving device coupled to the same output node. The driver circuit further includes a slew rate controller coupled to the first and second driving devices. The slew rate controller includes a first reference device coupled to the first driving device. The first reference device generates a first current. The slew rate controller also includes a second reference device coupled to the second driving device. The second reference device generates a second current. The slew rate controller further includes a summing device, coupled to the first and second reference devices. The summing node is also coupled to the output node, via an integrating device, to the output node. The summing device generates at the output node a slew rate proportional to the first current when the first driving device is substantially conducting. The summing device also generates at the output node a slew rate proportional to the second current when the second driving device is substantially conducting.
    • 用于经由其输出节点将数据发送到传输线的驱动器电路包括耦合到输出节点的第一驱动装置和耦合到相同输出节点的第二驱动装置。 驱动器电路还包括耦合到第一和第二驱动装置的压摆率控制器。 压摆率控制器包括耦合到第一驱动装置的第一参考装置。 第一参考装置产生第一电流。 压摆率控制器还包括耦合到第二驱动装置的第二参考装置。 第二参考装置产生第二电流。 压摆率控制器还包括耦合到第一和第二参考装置的求和装置。 求和节点还经由积分装置耦合到输出节点到输出节点。 所述求和装置在所述输出节点处产生与所述第一驱动装置基本导通时的与所述第一电流成正比的压摆率。 求和装置还在输出节点产生与第二驱动装置基本导通时的与第二电流成比例的转换速率。