Calibrated differential voltage crossing

Details Calibrated differential voltage crossing Calibrated differential voltage crossing

2006-12-19

2006-12-19

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Signal frequency or phase correction

C702S072000, C702S074000

Reexamination Certificate

active

07152008

ABSTRACT:
In general, in one aspect, the disclosure describes an apparatus for calibrating signals. The apparatus includes a receiver pair to receive a differential signal and a reference signal and to generate at least one comparison signal reflecting where a first signal of the differential signal and a second signal of the differential signal cross each other with respect to the reference signal. The second signal is a negative compliment of the first signal. The apparatus further includes a phase detector to determine a phase error based on the at least one comparison signal. The apparatus also includes an edge delay control driver pair to adjust the differential signal based on the phase error.

REFERENCES:
patent: 5672991 (1997-09-01), Thoma et al.
patent: 6011732 (2000-01-01), Harrison et al.
patent: 6526113 (2003-02-01), Gutierrez et al.

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