How to layout patterned ground shield for on-chip inductor?

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maolh

Joined: 16 Jun 2003
Posts: 39

30 Jun 2004 0:06 patterned ground shield

Hi, all,

Could you tell me how to layout patterned ground shield for on-chip inductor using virtuoso? Or are there any tools can do this job? Any suggestion wil be appreciated.

Thanks in advance.

nathan

Joined: 17 May 2001
Posts: 328
Helped: 2

30 Jun 2004 7:37 inductor patterned ground

Unfortunately, no tool is available to laid it out automatically. Either you do it by hand or write a complex skill procedure.

nathan

ptoo30

Joined: 07 Apr 2002
Posts: 57

30 Jun 2004 13:24 layout patterned ground shield

i also think there is no automatic deign tool for ground shield.
important item is to reduce the eddy current loss, for its simulation i use ADS or ASITIC:opensource aplying 3d electromagnetic characteristics to obtain "Q" of inductor \\ADS is nly 2 and half dimension and is not 3D
HFSS is good tool to simulate it but it takes huge hours for finishing simulation.

CDRCDR

Joined: 15 Feb 2004
Posts: 82
Helped: 2

25 Sep 2004 0:32 inductor ground shield

for the PGS,you could just layout part of that,and then make some copy/paste in virtuoso.The poly should not form a loop

mylihua

Joined: 23 Aug 2004
Posts: 20

25 Sep 2004 13:41 onchip inductor layout

The poly should not form a loop , why?

Thanks in advance....

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ilovebow

Joined: 25 Apr 2007
Posts: 24

24 Mar 2008 5:40 on chip inductor patterned ground

how about sonnet

Manjunatha_hv

Joined: 03 Aug 2005
Posts: 716
Helped: 105
Location: INDIA

06 Aug 2009 13:52 sonnet ground shield

Hello,

Yes, Sonnet is good for such simulations & even you can get the desired Q
Also it works with the Spiral Assitant tool to synthesize spiral on chip inductors
& it interfaces to Virtuoso...
see some of the links

http://www.muehlhaus.com/spiral_inductor_assistant.htm

http://www.sonnetlist.com/phpBB2/viewtopic.php?f=4&t=573

---manju---