Low-voltage differential signal driver with pre-emphasis...

Details Low-voltage differential signal driver with pre-emphasis... Low-voltage differential signal driver with pre-emphasis...

2007-08-14

2007-08-14

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C326S083000, C330S149000, C375S296000

Reexamination Certificate

active

11164405

ABSTRACT:
A low-voltage differential signal driver with a pre-emphasis circuit having a current control circuit and a pre-emphasis circuit is provided. Wherein, the pre-emphasis circuit includes the current sourcing circuit and the current sinking circuit, both of which have similar circuit structure, coupled to the current control circuit, respectively. The current sourcing circuit and the current sinking circuit are controlled by two sets of driving signals, so that the pre-emphasis circuit provides an extra driving current to the current control circuit at an instant when the current control circuit switches the current direction. In addition, each set of driving signals contains two synchronous but phase-inversed driving signals. The time it takes for the current steering circuit to switch terminated resistor current between upward and downward directions is decreased.

REFERENCES:
patent: 6054874 (2000-04-01), Sculley et al.
patent: 6111431 (2000-08-01), Estrada
patent: 6281715 (2001-08-01), DeClue et al.
patent: 6294924 (2001-09-01), Ang et al.
patent: 6483349 (2002-11-01), Sakata et al.
patent: 6646482 (2003-11-01), Takeuchi
patent: 6784690 (2004-08-01), Tran et al.
patent: 7183813 (2007-02-01), Kasanyal et al.

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