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8 Chapters
8 Chapters

Signal integrity signifies the signal’s ability to propagate without distortion. Signal integrity is nothing but the quality of the signal passing through a transmission line. Fundamentally, signal integrity issues must be taken care of during the PCB design phase. Once the board has been designed, there is little one can do to improve signal integrity.


A simple analogy for your understanding:

  • AM signal -> not so clear (distorted signals)
  • FM signal -> more clear (better signal integrity)


To be more descriptive, signal integrity is the measurement of the quality of an electrical signal typically in electronic printed circuit boards. In digital electronics, a stream of binary values is represented by a voltage (or current) waveform. However, digital signals are fundamentally analog in nature, and all signals are subject to effects such as noise, distortion and loss.




  • Detecting impedance discontinuities
  • What is crosstalk?
  • What are reflections, ringing, overshoot, and undershoot?
  • What is a via stub?
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Sierra Circuits PCB Certifications & Registrations

Sierra Circuits holds IPC-6012, IPC-6013, IPC-6015, IPC-6018, and IPC-A-600 PCB certifications
Sierra Circuits is ISO 9001:2015 certified for Military and Aerospace PCBs
Sierra Circuits is ISO 13485:2016 certified for Medical Device PCBs
Sierra Circuits is ITAR Registered
Sierra Circuits holds MIL-PRF-55110 & MIL-PRF-31032 PCB certifications
Sierra Circuits is certified by the National Institute of Standards and Technology
Sierra Circuits is REACH Compliant for PCB certifications
Sierra Circuits is RoHS Compliant for PCB certifications
Sierra Circuits holds PCB certifications for Flex, Rigid-Flex, and Rigid PCBs by the Underwriters Laboratory



Sierra Circuits has been trusted by innovators as a go to resource for best in class circuit boards since 1986.

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Since 1986, Sierra Circuits has faithfully served more than 20,000 PCB designers and engineers with PCB design, manufacturing and assembly and High-Density Interconnect technology.

Sierra Circuits handles all aspects of PCB production. From PCB layout and design, to assembly and manufacturing—we provide our customers with unprecedented quality, reliability, and a single point of support.

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