Transcription of Section 5 High Speed PCB Layout Techniques
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Section 5 High Speed PCB Layout Techniques
High Speed Analog Design and Application Seminar5-1 Texas InstrumentsSection 5 High Speed PCB Layout TechniquesScenario: You have spent several days, no maybe weeks, perfecting adesign on paper and also using Spice to ensure the design exceeds allexpectations. You hand the schematic to your Layout person who puts alleverything on a printed circuit board (PCB). The PCB comes back in a weekor two and is finally populated and ready to test. But it doesn t work!!!!Why not? On paper it works!! Spice said it works!! But it doesn t work!!This scenario happens more often than not and the reason many circuits donot work as expected is due primarily to the PCB Section looks at some key fundamentals of high Speed PCB layouttechniques so that hopefully the above scenario will never happen to Speed Analog Design and Application Seminar5-2 Texas InstrumentsPCB Components + twhlnL(nH) () ++
starts at the load side of the resistor. This system may have a undefined characteristic impedance that may cause reflection concerns. The last concern is the single ground connection point of the connector. This may cause a significant impedance mismatch in …
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