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raja.cedt Senior Fellow Offline Posts: 1516 Germany	Switch cap simulation in hspice May 13^th, 2009, 8:16am hi, can any body please tell me how to simulate switch cap circuit in hspice? Thanks, Rajasekhar.
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Geoffrey_Coram Senior Fellow Offline Posts: 1998 Massachusetts, USA	Re: Switch cap simulation in hspice Reply #1 - May 14^th, 2009, 7:06am Umm ... get a netlist, put in a .tran analysis statement ... ? What are you trying to do?
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raja.cedt Senior Fellow Offline Posts: 1516 Germany	Re: Switch cap simulation in hspice Reply #2 - May 14^th, 2009, 8:02pm hi, but i want to do ac analysis, then how to give clock? Thanks, rajasekhar.
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Geoffrey_Coram Senior Fellow Offline Posts: 1998 Massachusetts, USA	Re: Switch cap simulation in hspice Reply #3 - May 15^th, 2009, 4:36am I think you need a PAC (periodic ac) analysis. Maybe you can use hbac (harmonic balance ac). See if you can find an app note on SolvNet.
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cmos.analogvala Community Member Offline Posts: 65 India	Re: Switch cap simulation in hspice Reply #4 - May 16^th, 2009, 2:52am Is possible to do simulations similar to PAC or HBAC in Cadence Spectre . . -CA
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Re: Switch cap simulation in hspice
Reply #5 - May 16^th, 2009, 3:03am

cmos.analogvala wrote on May 16^th, 2009, 2:52am:

Is possible to do simulations similar to PAC or HBAC in Cadence Spectre . .

HBAC which Geoffrey_Coram means is an analysis of HSPICE RF.

"Multitone Harmonic Balance AC Analysis (.HBAC)"
http://www.ece.rochester.edu/courses/ECE222/hspice/hspice_rf.pdf

In HSPICE(not RF), you can use combination analysis of ".AC", ".Noise", and ".SAMPLE" analysis, although it is not accurate evaluation.

Also see
http://www.designers-guide.org/Forum/YaBB.pl?num=1241681618/1#1
http://www.designers-guide.org/Forum/YaBB.pl?num=1210932698
http://www.designers-guide.org/Forum/YaBB.pl?num=1215093196/1#1

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