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  3. How to change the m factor (multiplication factor) for Instances...

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How to change the m factor (multiplication factor) for Instances in cadence

NorNand
NorNand over 6 years ago

Hello,

I start to work recently with Model Generator (ModGen) in Cadence Layout XL editor. The Cadence version is IC6.1.5 64 bit.

In order to interdigitate my matched array transistors with a specific pattern I need to define first the m-factor of the transistors, just an example I took this from Cadence help manual :

"......For example, if you have two devices with an m-factor of four, and you specify two rows with the base pattern of ABBA, you would create the following interdigitation pattern:

A B B A
A B B A.... "

If I don't set m then ModGen can not interdigitate my transistors.

However, there is no option I can see about  Multiplication Factor (m) from the instance properties as I have attached in this image. Then from where I can set this variable?

Thank you

Regards

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  • RiadKaced
    RiadKaced over 6 years ago

    You need to talk to your PDK provider or look at the PDK documentation on why the M factor is not a visible/editable on this form. Ths m-factor is actually a special paremeter, you can always add it a s property and will be handled properly, but that's for advance users. In your case, your best bet is speaking with your PDK provider.

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  • NorNand
    NorNand over 6 years ago in reply to RiadKaced

    Thank you Mr. Kaced,

    I will follow your suggestion and talk to PDK provider,

    Best Regards

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  • NorNand
    NorNand over 6 years ago in reply to RiadKaced

    Thank you Mr. Kaced,

    I will follow your suggestion and talk to PDK provider,

    Best Regards

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