That does it.  I wondered if the vdd, vdd_1, vd_2...vd_n would mess the
LVS up but it does not.

thanks

 

Jan 

 

From: [email protected]
[mailto:[email protected]] On Behalf Of Jake Baker
Sent: Thursday, October 08, 2009 3:26 PM
To: [email protected]
Subject: Re: getting a global plane into a hierarchical cell

 

Jan, does the attached help? Jake.

On Thu, Oct 8, 2009 at 12:57 PM, Jan <[email protected]> wrote:


I have an inverter cell created in layout.  Node names are vdd, gnd,
in, out.  I want to now create a string of inverters so I create a new
cell, called test_lay, and place some of the inverters in there and
connect them up.  How do I get the vdd and gnd nodes to be one solid
node in this second layout?  I have attached a jelib for you to take a
look.  For example I can't get the entire bottom node to be gnd.
Why do I want this?  Because the next level up in the hierarchy,
test2_lay, I want to have this string of inverters to be connected on
the left and right to the adjacent cells vdd and gnd busses.
The way I see around this is to create another bus in each hierarchy
that becomes the common bus, gnd or vdd, for that level.  Seems
redundant and unnecessary.
I ahve posted a jelib called test.jelib
Ideas?




-- 
http://CMOSedu.com/jbaker/jbaker.htm



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