Dual-mode output driver configured for outputting a signal...

Details Dual-mode output driver configured for outputting a signal... Dual-mode output driver configured for outputting a signal...

2006-12-26

2006-12-26

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S112000, C327S318000

Reexamination Certificate

active

07154309

ABSTRACT:
An integrated circuit includes a dual mode output driver configured for outputting an output signal according to either a high voltage mode or a low voltage mode, and a controller for controlling the dual mode output driver at the selected mode. The dual mode output driver includes a high-voltage pull-up/pull-down driver circuit and a low-voltage pull-up/pull-down driver circuit, the low-voltage pull-down transistor in series with the high-voltage pull-down transistor that is coupled to the output node. Protection circuitry prevents the low-voltage transistors from encountering an overvoltage condition during the high voltage mode, and controls the slew rate of the output signal during the low voltage mode.

REFERENCES:
patent: 5933034 (1999-08-01), Hastings et al.
“AMD-3181™ HyperTransport™ PCI-X® Tunnel Data Sheet”, 24637 Rev. 3.02, Aug. 10, 2004, pp. 1-87.

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