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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

  • I was just about to reply the same as Colin - the last example appears to have an inverter on the left, but the outputs is not connected. The lower middle nmos has the source floating - and the source of the top middle pmos is connected to the a input. It's very odd and doesn't appear to be anything useful.

    BTW, it should be pretty straightforward for you to draw out the schematics for these, and they are quite easy to recognize once you've done that... At the very least, you could write out a truth table (or even just simulate them) to work out the function.

    Regards,

    Andrew.

Reply

  • I was just about to reply the same as Colin - the last example appears to have an inverter on the left, but the outputs is not connected. The lower middle nmos has the source floating - and the source of the top middle pmos is connected to the a input. It's very odd and doesn't appear to be anything useful.

    BTW, it should be pretty straightforward for you to draw out the schematics for these, and they are quite easy to recognize once you've done that... At the very least, you could write out a truth table (or even just simulate them) to work out the function.

    Regards,

    Andrew.

Children
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