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Can I determine Vth for a MOSFET from a Curve Tracer? - RF Cafe
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mmaassel
Post subject: Can I determine Vth for a MOSFET from a Curve
Tracer? Posted: Thu Feb 05, 2009 11:13 am
Colonel
Joined: Mon Apr 10, 2006 12:43 pm
Posts: 25
Good day. This
might be a very simple question but I am stuck.
I have setup
a curve tracer simulation within SPICE (LTSPICE from Linear Technology).
I am just using the generic MOSFET model that comes with LTSPICE.
How can I determine the threshold voltage from the output of
the curve tracer?
LTSPICE does allow me to export the data from
the curve tracer plot into a form that I can import into an Excel Spreadsheet.
Any suggestions and/or reference material would be greatly appreciated.
Michael
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IR
Post subject: Re: Can I determine
Vth for a MOSFET from a Curve Tracer?Posted: Thu Feb 12, 2009 3:59 pm
Site Admin
Joined: Mon Jun 27, 2005 2:02 pm
Posts:
373
Location: Germany
Hello Michael,
I don't use this
kind of Spice. But in general I would say that for MOSFET (Depletion
or Enhancement), Vth is the point at which the current starts to ramp
up rapidly.
Here is a picture to demonstrate:
http://en.wikipedia.org/wiki/File:IvsV_mosfet.png
Hope this helps!
_________________
Best regards,
- IR
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mmaassel
Post subject: Re: Can I
determine Vth for a MOSFET from a Curve Tracer?Posted: Fri Feb 13, 2009
10:56 am
Colonel
Joined: Mon Apr 10, 2006 12:43 pm
Posts: 25
Good day IR.
Thank you very much for the answer
and the link.
Michael
Posted 11/12/2012
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