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).

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