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fixed capacitance and variable capacitance in cadence.

imagesensor123

 Hi,

    when i use "captab" function to print out the node capacitance, i found there are two kinds of capacitors, can anybody explain the difference between them? is there a skill function which can monitor  a node capacitance time to time? in fact, i have a column of transistor whose source was connected  together.in a simple word, is that the node capacitance (connect ten source together) equal to ten times of the capacitance of only one soure ?

regards,

zfeng

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  • Quek

    Hi zfeng

    I think it really depends on the design and if there is a need do so. I don't really monitor node capacitances myself. To monitor the change in node during a transient run, please use "infotimes" together with captab function. Please search for "infotimes" in $CDSHOME/doc/anasimhelp/anasimhelp.pdf.


    Best regards
    Quek

Reply
  • Quek

    Hi zfeng

    I think it really depends on the design and if there is a need do so. I don't really monitor node capacitances myself. To monitor the change in node during a transient run, please use "infotimes" together with captab function. Please search for "infotimes" in $CDSHOME/doc/anasimhelp/anasimhelp.pdf.


    Best regards
    Quek

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