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Fingers and multiplier of MOSFET

jun1119

Hi 

What is the meaning of finger and multiplier in a MOSFET as we can see in the properties of a MOSFET?

[URL=http://img12.imageshack.us/i/mosj.png/][IMG]img12.imageshack.us/.../URL]

 

I would highly appreciated if there are some diagrams and layout to be shown.

Thank  you

Parents

  • Hi,

    The m is the multiplication factor.

    In Layout XL, for transistors, the m from the schematic is used to create multiple layout instances with common parameters.

     i.e. for eg., a schematic instance M0 with total_width=6u, length=1u, fingers=3 finger_width=2u m=5

    will result in 5 layout instances:

    M0.0: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.1: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.2: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.3: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.4: total_width=6u, length=1u, fingers=3 finger_width=2u

    Rgds,

    Vikram

     

Reply

  • Hi,

    The m is the multiplication factor.

    In Layout XL, for transistors, the m from the schematic is used to create multiple layout instances with common parameters.

     i.e. for eg., a schematic instance M0 with total_width=6u, length=1u, fingers=3 finger_width=2u m=5

    will result in 5 layout instances:

    M0.0: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.1: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.2: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.3: total_width=6u, length=1u, fingers=3 finger_width=2u

    M0.4: total_width=6u, length=1u, fingers=3 finger_width=2u

    Rgds,

    Vikram

     

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