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Welcome to the DesignCon 2020 agenda and presentation download site. Here you can view and download conference and/or Chiphead Theater presentations before, during, and after the event. If you’re looking for a presentation from a specific session that you’re unable to find here, it is likely because the presenter has not provided permission for external use or has not yet shared their presentation with us. Please check back after the event for a more complete catalogue of available presentations.

Differential Pairs Don't Need a Return Path, or Do They?

Eric Bogatin  (Dean, Teledyne LeCroy Signal Integrity Academy)

Location: Chiphead Theater

Date: Thursday, January 30

Time: 11:15am - 12:00pm

Track: Chiphead Theater, 08. Measurement, Simulation & Improving Jitter, Noise & BER (Pre & Post FEC)

Format: Chiphead Theater Session

Pass Type: 2-Day Pass, All-Access Pass, Alumni All-Access Pass, Boot Camp Pass, Expo Pass - Get your pass now!

Vault Recording: TBD

Audience Level: Introductory

What happened to the return path in a cat 5 unshielded twisted pair (UTP) cable? What's different about a cat 5 or cat 6 cable? How does this relate to a differential pair in a circuit board? What happens to the differential impedance when the return plane is removed? If the return current cancels out in the plane, does it matter if the return plane is there?

If you are troubled with these questions about the role of the return path in a differential pair, come to this performance where I will challenge your fundamental understanding of differential pairs as it collides with real world, live measurements.