TWISTED DIFFERENTIAL COMPENSATION FOR ROUTING HIGH-SPEED SIGNALS NEAR POWER DELIVERY INDUCTORS AND SYSTEM MINIATURIZATION

Apparatus and methods employing twisted differential compensation for routing high-speed signals near power delivery inductors. Traces used for a high-speed differential signal including a P trace and an N trace are routed through one or more layers in a multi-layer printed circuit board (PCB) subst...

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Bibliographic Details
Main Authors BALAKRISHNAN, Ranjul, WANG, Long, HALL, Stephen H
Format Patent
LanguageEnglish
Published 16.12.2021
Subjects
CALCULATING
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
PHYSICS
PRINTED CIRCUITS
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Summary:Apparatus and methods employing twisted differential compensation for routing high-speed signals near power delivery inductors. Traces used for a high-speed differential signal including a P trace and an N trace are routed through one or more layers in a multi-layer printed circuit board (PCB) substrate and employ a twisted portion proximate to the centerline of an inductor under which portions of the P and N traces are swapped horizontally in a layer parallel to the top plane and/or are swapped vertically by swapping layers. The signal paths are routed such that a level of noise inductively coupled into the P trace and the N trace from the inductor is approximately equally. Stripline structures may be used for signals that are routed under an inductor, while stripline and microstrip structures may be used for signals routed adjacent to an inductor.
Bibliography:Application Number: US202117461675