Output driver with reduced ground bounce

Details Output driver with reduced ground bounce Output driver with reduced ground bounce

1997-06-30

2000-09-12

Le, Dinh T.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Signal transmission integrity or spurious noise override

327108, 327379, 327227, 326 26, 326 27, H03K 1716

Patent

active

061183245

ABSTRACT:
An output driver circuit including a first path from an output pad to ground through a first switch, and a second path from the output pad to ground through series-connected second and third switches. The first switch is directly connected to a pull-down signal source, and one of the second and third switches is connected to the pull-down signal source through a one-shot circuit. In a pull-up state, the first and second switches are opened, and the one-shot circuit generates a stabilized output signal which closes the third switch. When the output driver circuit switches to a pull-down state, the first switch is closed, thereby connecting the output pad to ground via the first path. The signal change also closes the second switch. In addition, due to a propagation delay of the second signal through the one-shot circuit, the third switch initially remains closed, thereby also connecting the output pad to ground via the second path. The one-shot circuit then opens the third switch before the output pad fully discharges. Subsequently, the one-shot circuit returns to its stabilized state and closes the third switch, thereby connecting the substantially fully discharged output pad to ground through both the first and second paths.

REFERENCES:
patent: 5144161 (1992-09-01), Inaba
patent: 5319252 (1994-06-01), Pierce et al.
patent: 5483177 (1996-01-01), Van Lieverloo

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