Programmable current output buffer

Details Programmable current output buffer Programmable current output buffer

2007-05-08

2007-05-08

Le, Don (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S087000

Reexamination Certificate

active

11012548

ABSTRACT:
A buffer for a programmable device has source current circuitry, sink current circuitry, one or more input nodes, one or more output nodes, and switch circuitry. The source current circuitry can be programmably controlled to generate a plurality of different total source currents, and the sink current circuitry can be programmably controlled to generate a plurality of different total sink currents. The one or more input nodes can receive one or more input signals, and the one or more output nodes can present one or more output signals. The switch circuitry can selectively apply at least one of a total source current and a total sink current to the one or more output nodes based on the one or more input signals.

REFERENCES:
patent: 6111431 (2000-08-01), Estrada
patent: 6236238 (2001-05-01), Tanji et al.
patent: 6281715 (2001-08-01), DeClue et al.
patent: 6433579 (2002-08-01), Wang et al.
patent: 6480026 (2002-11-01), Andrews et al.
patent: 6639434 (2003-10-01), Rahman
patent: 6975135 (2005-12-01), Bui
patent: 6992508 (2006-01-01), Chow
U.S. Appl. No. 10/910,092, filed Aug. 3, 2004.

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