Stats

  • Locked Locked
  • Replies 1
  • Subscribers 164
  • Views 1818
  • Members are here 0
More Content
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

EMC classes(1-5) in emc_checker

archive

Hi,

Does anybody know where can I find detailed information on class(1-5) as used in 'emc rule checker' in Allegro?
Also, do they have any connection with industry standards like ClassA,ClassB...

I'll appreciate any help.

Thanks,
Saad.


Originally posted in cdnusers.org by Saad
Parents

  • Hi Saad,

    EMControl requires that you assign a critical frequency class property to
    significant, or critical, components and nets before you perform EMC rule
    checking. Critical components include ICs that are relevant to rules that
    examine critical ICs, line drivers, line receivers, fast-switching transistors,
    or bi-directional transceivers.

    EMControl supplies up to five critical frequency classifications to describe the
    EMC characteristics of the ICs and nets in a design.

    There are up to five classes for components in a design. You can specify the
    corresponding variable value for each component class. You have CLASS1 through
    CLASS5 for these settings. For components, the fastest drivers result in a Frequency
    Class1 designation and the slowest drivers are designated a Frequency Class5. The
    EMC rules you apply to nets and components use this class designation.

    You can attach critical frequency classes (EMC_CRITICAL_IC, EMC_CRITICAL_NET,
    EMC_CRITICAL_REGION) to design objects automatically using the Manual Property
    dialog box from the EMC rule checker.

    When you identify the CLASS of the component you can also identify the type of
    component by adding the EMC_CVOMP_TYPE property.

    For each class of component you can also identify the Voltage swing and the
    Rise/Fall time

    In the EMC setup you can also define the EMI Regulation that you need to check
    against - FCC Class A, FCC Class B, CISPR Class A, CISPR Class B, USERDEF_CLASS,
    VCCI Class 1, VCCI Class 2




    Originally posted in cdnusers.org by rbennett
Reply

  • Hi Saad,

    EMControl requires that you assign a critical frequency class property to
    significant, or critical, components and nets before you perform EMC rule
    checking. Critical components include ICs that are relevant to rules that
    examine critical ICs, line drivers, line receivers, fast-switching transistors,
    or bi-directional transceivers.

    EMControl supplies up to five critical frequency classifications to describe the
    EMC characteristics of the ICs and nets in a design.

    There are up to five classes for components in a design. You can specify the
    corresponding variable value for each component class. You have CLASS1 through
    CLASS5 for these settings. For components, the fastest drivers result in a Frequency
    Class1 designation and the slowest drivers are designated a Frequency Class5. The
    EMC rules you apply to nets and components use this class designation.

    You can attach critical frequency classes (EMC_CRITICAL_IC, EMC_CRITICAL_NET,
    EMC_CRITICAL_REGION) to design objects automatically using the Manual Property
    dialog box from the EMC rule checker.

    When you identify the CLASS of the component you can also identify the type of
    component by adding the EMC_CVOMP_TYPE property.

    For each class of component you can also identify the Voltage swing and the
    Rise/Fall time

    In the EMC setup you can also define the EMI Regulation that you need to check
    against - FCC Class A, FCC Class B, CISPR Class A, CISPR Class B, USERDEF_CLASS,
    VCCI Class 1, VCCI Class 2




    Originally posted in cdnusers.org by rbennett
Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.