Designer’s Guide Community

337see733 Community Member Offline Posts: 39 Singapore	Re: Source/drain symmetric in MOSFET model Reply #15 - Jan 25^th, 2006, 5:40pm Quote: No, I meant that you need vx to go from -1 to +1. You should have vb and vg fixed during the sweep (and run the test at several vg and several vb values). VD should be +vx and VS should be -vx. Yes, I think i should try to do this.
Back to top	IP Logged

337see733 Community Member Offline Posts: 39 Singapore	Re: Source/drain symmetric in MOSFET model Reply #16 - Feb 6^th, 2006, 1:43am I've include the Vs in everywhere of the equation(codes)...sgh...There is some problem with the transition from vx to -vx... I assume this is coding problem rather than the equation itself...Because, I checked at a single bias of Vd and Vs or (Vs and Vd interchange), the output current are the same.
Back to top	IP Logged

337see733

Community Member

Offline

Posts: 39
Singapore

Re: Source/drain symmetric in MOSFET model
Reply #17 - Feb 6^th, 2006, 6:58pm

Quote:

No, I meant that you need vx to go from -1 to +1. You should have vb and vg fixed during the sweep (and run the test at several vg and several vb values). VD should be +vx and VS should be -vx.

Yes, I think i should try to do this.

Finally, i did that. But, the answer looks similar to the one i do with the flip-reflect approach!

Back to top

vx.jpg

IP Logged

337see733 Community Member Offline Posts: 39 Singapore	Re: Source/drain symmetric in MOSFET model Reply #18 - Feb 6^th, 2006, 10:43pm Hmm...This is symmetry, right? ;D
Back to top	vx_001.jpg IP Logged

Geoffrey_Coram

Senior Fellow

Offline

Posts: 1999
Massachusetts, USA

Re: Source/drain symmetric in MOSFET model
Reply #19 - Feb 7^th, 2006, 9:45am

337see733 wrote on Feb 6^th, 2006, 6:58pm:

Finally, i did that. But, the answer looks similar to the one i do with the flip-reflect approach!

But with the flip-reflect approach, you haven't actually tested anything. If you want to test that f(x) is an odd function, you can't test it for positive x and then plot it for negative x using the flip-reflect approach.

Your last post looks like you've solved your problem now, though.

Back to top

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

IP Logged

337see733 Community Member Offline Posts: 39 Singapore	Re: Source/drain symmetric in MOSFET model Reply #20 - Feb 7^th, 2006, 5:23pm Quote: Your last post looks like you've solved your problem now, though. Yes...finally......still testing it to verify. ;D Thanks a thousands...
Back to top	IP Logged