This is the top of the page.
Displaying present location in the site.
  1. Home
  2. Products
  3. EMIStream
Main content starts here.


EMI Suppression Support Tool for PCB

EMIStream top

EMIStream is an EMI suppression support tool developed by NEC that can decrease undesirable EMI generated from PCB at an early design stage. EMI Design Rule Check scans your board against 15 rules and lists errors in order of priority, allowing time-efficient noise countermeasures. Power/ Ground Resonance Analysis shows you the hot spots on the board, enabling optimized capacitor placement to reduce resonance.

Major electronics manufacturers worldwide, including NASA, are using EMIStream to significantly decrease the time and cost spent on the design and evaluation process.

What's New

  • April 26, 2018

    EMIStream V5.2-002 has been released.

  • April 24, 2018[Holiday Closing Notice] Our office will be closed for Spring Holidays from April 28, 2018 (Sat) to May 6, 2018 (Sun). We apologize for any inconvenience.
  • January 29, 2018

    EMIStream and PIStream will be showcased at DesignCon 2018 expo from January 31 to February 1, 2018 in Santa Clara, CA, USA, at TOYO booth.

    DesignCon 2018  

  • January 29, 2018

    Please join us at the "Automotive EMC Design & Test Seminar" on February 6th, 2018 in Troy, MI, USA. For details, please visit TOYO website.

    Automotive EMC Design & Test Seminar (TOYO)

  • December 13, 2017

    [Holiday Closing Notice] Our office will be closed for New Year Holidays from December 29, 2017 (Fri) to January 4, 2018 (Thu). We apologize for any inconvenience.

  • August 30, 2017

    EMIStream V5.1-001 has been released.

  • January 16, 2017

    EMIStream and PIStream Ver.5 will be showcased at DesignCon 2017 expo from February 1 to 2, 2017 in Santa Clara, CA, USA, at TOYO booth.

    DesignCon 2017  

  • September 23, 2016EMIStream V5.0-003 has been released.
  • May 11, 2011NASA Johnson Space Center Adopts EMIStream for EMI Suppression for PCBs
  • April 21, 2010[Notice] Illegal copy of EMIStream on the internet.

What is EMIStream?

EMIStream is an EMI Design Rule Check and Plane Resonance Analysis tool that can suppress undesirable EMI generated from PCB. By eliminating possible EMI issues at the initial design stage, EMIStream will improve efficiency, significantly decrease time spent on the evaluation process, and enable rapid time-to-market.
Many choose to use EMIStream for its user-friendly interface, easy 4-step setup, speedy analysis, and seamless work flow with multiple CAD layout interfaces.

EMIStream Key Functions and Options

EMI Rule Check

EMI Rule Check

EMIStream was developed by engineers at NEC who were facing EMI problems with their own products and research. EMIStream is a result of research and development by these engineers seeking a solution for their real-world EMI problems.
Over 150 rules were investigated, and were boiled down to 15 critical rules.

Power/ Ground Resonance Analysis

Plane Resonance Analysis

EMI is easily increased if resonance occurs between the power and ground planes. The power and ground plane resonance analysis function takes into account plane shapes, capacitors, and distance between the power/ground planes to analyze resonance based on the PEEC (Partial Element Equivalent Circuit) method.

ESD Rule Check Option

ESD Rule Check

A discharge can occur when an electrically charged object, including a human body, touches an electronic device. This phenomenon, called ESD (electrostatic discharge), can cause malfunction and failure of electronic devices. EMIStream ESD Rule Check Option will detect areas where ESD tolerance levels are low on a PCB and offer suggestions for solutions.

Power Integrity (PI) Analysis Option

PI Analysis

Power voltage drops related to advanced semiconductor technologies have been increasing, and countermeasures for suppressing undesirable electromagnetic waves caused by IC malfunction have been gaining attention.
This function allows you to verify capacitor location, number of pieces, and capacitance value in order to suppress this problem.

  • *EMIStream and PIStream are either registered trademarks or trademarks of NEC Solution Innovators, Ltd. in the United States and/or other countries.
  • PIStream
  • Genissnx
  • CyberWorkBench

Top of this page