High speed, out-of-band differential pin driver

Details High speed, out-of-band differential pin driver High speed, out-of-band differential pin driver

2008-05-13

2008-05-13

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S016000

Reexamination Certificate

active

11477971

ABSTRACT:
A driver block for a differential pin driver that supports out-of-band signaling. The driver block includes a main enable switch that is controlled by a high speed driver inhibit (DINH) signal. The main enable switch controls coupling between a main current source and a differential pin driver output stage. The main enable switch is coupled in series with an output select switch that selects between a positive output and a negative output. The driver block also includes a positive enable switch for controlling coupling between the positive output and a positive level shifter that shifts voltages of the positive output. The driver block also includes a negative enable switch for controlling coupling between the negative output and a negative level shifter that shifts voltages of the negative output.

REFERENCES:
patent: 6968172 (2005-11-01), Saito
patent: 7112989 (2006-09-01), Ooshita et al.
patent: 7276970 (2007-10-01), Khorramabadi

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