Differential Pair Hero

Differential Pairs

Differential Pairs are fantastic for routing long connections as they can remove common-mode noise and overcome any changes in ground potential.

What are Differential Pairs?

Differential pairs comprise two complementary parts. They can carry faster signals than single-ended connections.

Benefits of Differential Pairs

  • The received signal is the difference between the two complementary parts, so noise on one side is canceled by similar noise on the other
  • Most differential pairs are routed closely parallel, and they couple electromagnetically. Key parameters such as differential impedance are localized, creating a tight signaling channel. Radiated electromagnetic interference (EMI) is also more localized. Careful routing is essential.
  • eCADSTAR provides facilities to make sure differential-pair routing will produce correct results

These short videos explain the basics of this technique – illustrated in eCADSTAR

Differential Pair Primer


  • How differential signaling differs from single-ended
  • Odd-mode, even-mode, and differential impedance

A Differential Pair and its Termination


  • Why differential length-matching alone is not enough
  • Subtle considerations when terminating
  • How mode-dependence varies with coupling

Discover more about the full capabilities of eCADSTAR through our datasheets, videos, and webinars. Should you be ready to take it to the next step request a free evaluation to experience our PCB software for yourself. Unified, connected, and comprehensive, eCADSTAR has all you’ll need to take a project from conception to production.

Jane Berrie
Jane BerrieElectronic Design Technology Partner
Jane Berrie is an EDA product innovator and technical marketing content creator, focusing on high-speed design and signal integrity. She is a published author of technical articles and a past session chair at the annual Design Automation Conference (DAC).

Ready to brush up on something new? We’ve got more videos to watch right this way.

Only Pay for What You Need

A flexible, modular approach allows you to build an eCADSTAR bundle to fit your PCB design requirements.
Select Your Bundle