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input output circle equivalent in cadence virtuoso

robert 21

Hello, There is a manual in matlab of matching LNA  shown in the link bellow.

In it as shown in the plot bellow they mention input and output circle plots.

Is there such option of input and output circle in cadence virtuoso?

https://www.mathworks.com/help/rf/examples/designing-matching-networks-part-1-networks-with-an-lna-and-lumped-elements.html

  • Andrew Beckett
    in reply to robert 21
    robert 21 said:
    is there another way to download this 19.1 version?

    No. You'll need to either download the software release and find it there, or use the link to support.cadence.com that I provided.

    However, I checked, and the document and database is in all SPECTRE18.1 versions (yes, it's the 18.1 version, but it will be similar):

    UNIX> ls SPECTRE181*/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_cd/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr1/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr10/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr11/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr12/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr2/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr3/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr4/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr5/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr6/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr7/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr8/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf
    SPECTRE181_isr9/doc/spectreRFexplorerWorkshop/spectreRFexplorerWorkshop.pdf

    UNIX> ls SPECTRE181*/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_cd/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr1/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr10/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr11/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr12/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr2/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr3/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr4/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr5/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr6/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr7/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr8/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz
    SPECTRE181_isr9/tools/spectre/examples/SpectreRF_workshop/RF_Doc_Database.tar.gz

    So I've no idea why you can't find it. The document you gave is the old workshop that used to be shipped, and hasn't been updated for a while (which is why it shows 16.1).

    Regards,

    Andrew

  • robert 21
    in reply to Andrew Beckett

    Hello Andrew , i have found the manual you showed spectreRFexplorerWorkshop.pdf,in the directory shown bellow.its explaining each term separatly.

    Is there a manual in this directory or other place which shows an example of both getting LNA into some available gain and stable or visa verse getting the LNA with certain power gain and output stable using smith chart circuit method?

    Thanks.

  • Andrew Beckett
    in reply to robert 21
    robert 21 said:
    i have found the manual you showed spectreRFexplorerWorkshop.pdf,in the directory shown bellow

    In other words, exactly where I told you it was.

    robert 21 said:
    Is there a manual in this directory or other place which shows an example of both getting LNA into some available gain and stable or visa verse getting the LNA with certain power gain and output stable using smith chart circuit method?

    No, as the documents are either documenting the tools, or illustrating how the tools can be used to perform analysis (often with some suggestions as to how the analysis could be used, such as in the document I pointed you at). They do not teach you how to design; that's what text books and University courses are for. There are many good books on RF and Microwave design available. Smith Charts are not exactly new - they were first presented by Phillip H. Smith in 1939 (see this article for a note on the history).

    Andrew

  • robert 21
    in reply to Andrew Beckett

    I understand,Thank you very much.

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