文档介绍：HighHigh SpeedSpeed PCBPCB DesignDesign
Ride the Wave Workshop
PostPost RouteRoute AnalysisAnalysis ofof aa HighHigh
SpeedSpeed PCBPCB DesignDesign
Design/Analysis for
Power Delivery System (PDS)
PostPost RouteRoute AnalysisAnalysis ofof aa HighHigh
SpeedSpeed PCBPCB DesignDesign
Designing for the Future
• In today’s world, the demand for ultra-high-speed PCB design is on the
rise
• Engineers are assigned the task of design mixed analog and fast rise-time
digital boards, and have all signals arrive at their destination cleanly
• With the advance of highly specialized design and layout software, the
design of these boards has e increasingly ‘easy’(automated)
• These physical design and layout tools can be provided with design
constraints and auto-routed easily, resulting in increased productivity of the
layout engineer and contributions to signal integrity problems
Designing for the Future
• The advancement of design and layout software needs to be matched by
the panying advancement in powerful ANALYSIS tools used to
solve timing delays, mismatched line impedances, crosstalk, and dielectric
loss on high speed lines
• Just as an auto-layout program cannot layout 100 percent of s on a
complex, high-speed board, an analysis tool cannot default to 2-
dimensional field solvers and behavioral models on 100 percent of s
on a PCB.
• s on a board may be analyzed accurately using 2-d solvers.
However, critical signals will require a full 3-d solver that does not default
to an ‘ideal’ case for the current return path. The full 3-d solver will take
into account ground planes with holes, cutouts or that are split. Changes in
reference planes, cutouts, and coupling to power/ground planes are other
situations that require a full 3-d solver
Goals for this Presentation
• Show the integration between Allegro and PCB/MCM
• Show mixed 2D and 3D extractions
• Show and simulations
• Show how to investigate signal integrity issue