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Identify the logic function of a layout

gonsays

Hello,

I'm a Microelectronics student and I'm in a struggle to understand which logic function is associated with the following layout:

It says that the circuit has four inputs (A and B) and one output (y), in an N-WELL TECHNOLOGY.

Thank you very much in advance and I'm sorry for my basic question for you

Parents

  • Hi Goncalo,

    this layout represents a so-call complex, or a compound logic gate

    It looks like a ORAND gate followed by an inverter. (I hope I got that right)

    That is, a 2-input OR gate feeding a 2 input AND gate The output of the AND gate is inverted

    These gates are used because it can save space.

    If you know the cellname of this layout, the function is probably contained in it's name (eg 21OAI perhaps).

    Do a search for complex logic gates using the string AOI and OAI in your search.

    Hope this helps

Reply

  • Hi Goncalo,

    this layout represents a so-call complex, or a compound logic gate

    It looks like a ORAND gate followed by an inverter. (I hope I got that right)

    That is, a 2-input OR gate feeding a 2 input AND gate The output of the AND gate is inverted

    These gates are used because it can save space.

    If you know the cellname of this layout, the function is probably contained in it's name (eg 21OAI perhaps).

    Do a search for complex logic gates using the string AOI and OAI in your search.

    Hope this helps

Children
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