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    How is the maximum inductor value in a technology process is determined

    Hi I came to know that the maximum value that can be achieved in a technology process is restricted. Could someone eloberate on this. How would I know what is the maximum inductor value that can be designed using a particular technology (PDK). Thanks in advance.

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    Re: How is the maximum inductor value in a technology process is determined

    Only PDK Supplier can answer this..There must be max limits..



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    Re: How is the maximum inductor value in a technology process is determined

    One limit is the series resistance of the spiral, and
    somebody in the foundry design group might pick
    a number from an unspecified orifice and declare
    it a limit.

    If you need Q then you're going to be looking at
    smaller inductors (or maybe MxN of them?). I do
    not know whether people who do know, play with
    arrayed inductors as an alternative to big singles.

    If you only look at L value then



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    Re: How is the maximum inductor value in a technology process is determined

    Quote Originally Posted by circuitking View Post
    Hi I came to know that the maximum value that can be achieved in a technology process is restricted. Could someone eloberate on this. How would I know what is the maximum inductor value that can be designed using a particular technology (PDK). Thanks in advance.
    Here are some typical values of inductors as well as Q and peak freq in 65nm PDK, Let take a look at it to get more insight of real world process. In essence, the foudary does not recommend us to design with such a high inductance (if > 10 nH, you are supposed to employ off chip inductor for better perfomance) rather than those given in this table because of their low Q.
    Click image for larger version. 

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    Have fun !!


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