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# xi0.m1: Effective length is less than or equal to zero?? newbie in cadence!

Last post Fri, Feb 16 2007 9:14 AM by archive. 2 replies.
 Started by archive 16 Feb 2007 09:14 AM. Topic has 2 replies and 1185 views
• #### Fri, Feb 16 2007 9:14 AM

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xi0.m1: Effective length is less than or equal to zero?? newbie in cadence!
 I m in inverter tutorial and getting error = xi0.m1: Effective length is less than or equal to zero. I changed the L & W to a certain range but it did not help. Moreover for an another project i need to vary L & W to a certain range and see its graph simultaneously ... Can i do this? I know i can vary dc ac voltage and all that in analysys section but how can i do this in case of physical parameters such as Length and Width? Can i vary the performance by changing any other parameter? Thanks fr suggestionOriginally posted in cdnusers.org by dozy_walia
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• #### Tue, Feb 20 2007 1:01 PM

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RE: xi0.m1: Effective length is less than or equal to zero?? newbie in cadence!
 Not sure what you mean by inverter tutorial. Please post your netlist. As far as varying W and L and plotting, one way to do it is to make them design variables and run parametric analysis.Originally posted in cdnusers.org by EricCDN
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• #### Wed, Feb 21 2007 7:01 AM

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RE: xi0.m1: Effective length is less than or equal to zero?? newbie in cadence!
 Dear Eric ,Many thanks for response.I was keenly interested in parametric analysis in order to check the parasitics in deep submicron range and hence thought to use Cadence as a tool and started learning it. I started to implement things like OP-AMPs and invertors. Errors are resolved now.Do send me if you have anything useful for me .Thanks in anticipationSincerely,KulwinderOriginally posted in cdnusers.org by dozy_walia
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 Started by archive at 16 Feb 2007 09:14 AM. Topic has 2 replies.
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