Current differential buffer

Details Current differential buffer Current differential buffer

2007-08-28

2007-08-28

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S562000, C327S563000

Reexamination Certificate

active

11006364

ABSTRACT:
The present technique relates to a method and apparatus for operating a differential buffer. In the differential buffer, a first stage may include a differential pair configured to receive input signals and generate output signals. The first stage may also include adjustment circuitry coupled to the differential pair and configured to adjust an amount of current dissipated by the differential buffer. Further, a second stage may include current pulse circuitry coupled to the differential pair and the adjustment circuitry, wherein the current pulse circuitry is configured to generate a current pulse that is coincident with the switching of the differential pair. Finally, the second stage may also include grounding circuitry coupled to the current pulse circuitry and the differential pair, wherein the grounding circuitry is configured to receive the current pulse to prevent the output signals from switching during a transition of the output signals. As such, the differential buffer provides low or no static current dissipation with improved signal integrity for high-speed operation.

REFERENCES:
patent: 5673208 (1997-09-01), Meier et al.
patent: 5884242 (1999-03-01), Meier et al.
patent: 6577170 (2003-06-01), Prodanov
patent: 6825692 (2004-11-01), Chung et al.
patent: 6944079 (2005-09-01), Howe
patent: 2003/0181181 (2003-09-01), Darabi
patent: 2005/0248396 (2005-11-01), Caresosa et al.

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