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wateror
Joined: 26 Aug 2007
Posts: 62
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 23 Aug 2008 11:37 how to print node capacitor in spectre? |
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we can use .print cap(node) to plot capacitor curves in hspice. But how do we do that in spectre? I found there was a captab option in transient analysis. But it seems that it only calculate a capacitors at one point...
Is there any idea?
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rfsystem
Joined: 25 Feb 2002
Posts: 798
Helped: 85
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| 23 Aug 2008 17:26 Re: how to print node capacitor in spectre? |
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I had done a function request to Smash some years ago to implement the printing of node capacitance and node impedance. These infos are side effects of the modified nodal analysis but still not used in simulators.
I need it some years ago for detection of floating nodes in analog circuit. I know that for digital TL there exist something but for analog there is nothing. You have to reason all transistors and all modes for your self. That is still the case.
I have heard that this functions is now implemented in Smash.
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ssuchitav
Joined: 12 Jun 2006
Posts: 25
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| 24 Aug 2008 7:33 Re: how to print node capacitor in spectre? |
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could you try the option captab=1,
see if it works.
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wateror
Joined: 26 Aug 2007
Posts: 62
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| 25 Aug 2008 3:44 how to print node capacitor in spectre? |
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| captab=1? do you mean I should write spectre netlist? But I really want to do it in Analog enviorenment...
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ssuchitav
Joined: 12 Jun 2006
Posts: 25
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| 26 Aug 2008 4:14 Re: how to print node capacitor in spectre? |
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| captab option is there in analog environment also. there is a switch under analysis options,that you need to enable.
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