Differential transmission line

Electronic digital logic circuitry – Interface – Current driving

Reexamination Certificate

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Details

C326S090000, C326S101000

Reexamination Certificate

active

07741876

ABSTRACT:
A differential transmission line that has three or more signal lines and with which there is little unwanted radiation noise is provided. The differential transmission line2is provided with three signal lines2a,2b, and2cthat transmit differential signals from a differential driver IC1to a differential receiver IC3, and the majority of the signal lines2a,2b, and2cis provided in conductor layers T2and T3of a printed circuit board4. The signal lines2a,2b, and2care provided with a signal line parallel segment, a signal line route length adjustment segment that is on the differential driver IC1side and that connects from differential signal output terminals1Ea,1Eb, and1Ec in the differential driver IC1to the signal line parallel segment, and a signal line route length adjustment segment that is on the differential receiver IC3side and that connects from the signal line parallel segment to differential signal input terminals in the differential receiver IC3, wherein the signal lines2a,2b, and2care formed such that their signal line route length adjustment segments on the differential driver IC1side are equal in length to one another.

REFERENCES:
patent: 6556628 (2003-04-01), Poulton et al.
patent: 2007/0241836 (2007-10-01), Miller
patent: 2001-267701 (2001-09-01), None
patent: 3507687 (2003-12-01), None

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