Designer’s Guide Community

Pages: 1 2

Dummy transistor and decoupling capacitor (Read 16553 times)

Geoffrey_Coram Senior Fellow Offline Posts: 1999 Massachusetts, USA	Re: Dummy transistor and decoupling capacitor Reply #15 - Mar 30^th, 2007, 9:00am chase.ng wrote on Mar 26^th, 2007, 6:28pm: Are those fets ESD protected in any other way? Or they just wired the gates to power supply? Is the parasitic resistance in the wiring sufficient to protect the gates from ESD? I'd think you'd want a kOhm or so of explicit resistance ...
Back to top	If at first you do succeed, STOP, raise your standards, and stop wasting your time. IP Logged

Geoffrey_Coram

Senior Fellow

Offline

Posts: 1999
Massachusetts, USA

Re: Dummy transistor and decoupling capacitor
Reply #16 - Mar 30^th, 2007, 9:02am

[quote author=Croaker link=1173775896/0#8 date=1174662643]krishnap wrote on Mar 23^rd, 2007, 2:47am:

I was actually asking...I think it can be minimum length in all cases, but if anyone knows differently, please let me know!

I thought the idea with these dummy gates was to make a regular array of poly stripes, and therefore they should all have the same length.

If at first you do succeed, STOP, raise your standards, and stop wasting your time.

IP Logged

Croaker

Senior Member

Offline

Posts: 235

Re: Dummy transistor and decoupling capacitor
Reply #17 - Mar 30^th, 2007, 9:04am

[quote author=Geoffrey_Coram link=1173775896/15#16 date=1175270525]Croaker wrote on Mar 23^rd, 2007, 8:10am:

krishnap wrote on Mar 23^rd, 2007, 2:47am:

I was actually asking...I think it can be minimum length in all cases, but if anyone knows differently, please let me know!

I thought the idea with these dummy gates was to make a regular array of poly stripes, and therefore they should all have the same length.

Well yes, outer poly gets more etched than the inner poly fingers, so you put a dummy on the outer edge to get the extra etching.

However, I think the dummy can be minimum length since it is only there to get a bit etched.

IP Logged

ywguo Community Fellow Offline Posts: 943 Shanghai, PRC	Re: Dummy transistor and decoupling capacitor Reply #18 - Apr 2^nd, 2007, 11:31pm It is really interesting. Does anybody has measurement result or sth. else?
Back to top	IP Logged

Pages: 1 2

‹ Previous topic | Next topic ›