Power MOSFET SPICE modelling

How can they SPICE model two distinct serially connected resistors (Rls, 
Rcs - respectively Rll, Rcl) inside a power MOSFET? Are they kidding us 
;-) If so is that useful in the model?:


A Low-Cost Class-E Power Amplifier with Sine-Wave Drive - Caltech:
http://www.its.caltech.edu/~mmic/reshpubindex/papers/ClassE.pdf
(pdf-page 3)

-

Is it possible (how?) to measure the internal parasitic components with 
a homemade impedance bridge?:

An Inexpensive Impedance Bridge:
http://www.rfcafe.com/references/qst/inexpensive-impedance-bridge-jul-1944-qst.htm

Can this be used to measure the guts of a power MOSFET?:

http://www.sdr-kits.net/
A Low Budget Vector Network Analyzer for AF to UHF
http://sdr-kits.net/DG8SAQ/VNWA/baier_VNWA10_QEX.pdf
DG8SAQ Vector Network Analyser - VNWA2.x Description
http://www.sdr-kits.net/VNWA/VNWA_Description.html
http://www.mydarc.de/dg8saq/VNWA21/index.html

HP4194A is not within my range. Can HP4194A automatically deduce the 
power MOSFET guts?

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Power MOSFET IRFP450LC, SiHFP450LC - Vishay:
http://www.vishay.com/docs/91231/91231.pdf
IRFP450LC (IRF?):
http://datasheet.octopart.com/IRFP450LC-Vishay-datasheet-58277.pdf

/Glenn

How can they do that? For a novice like me it look like magic:

S-parameter to SPICE Model Converter:
http://www.emwonder.com/spicemodels/


RD15HVF1 - Mitsubishi Electric:
http://www.mitsubishielectric.com/semiconductors/php/ePartProfile.php?FILENAME=rd15hvf1.pdf&FOLDER=/product/hf/sirfpowermosfet/siliconrfdiscrete/siliconrfdiscrete_lv4

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March 18, 2010, Swimming in the channel:
http://www.edn.com/design/analog/4312334/Swimming-in-the-channel
Quote: "...
HFSS (high-frequency structural simulator), is a general-purpose field 
solver that also allows Spice modeling for S parameters and matrix solvers.
..."

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( https://www.google.com/search?q=infer+spice+model+s-parameters )

/Glenn

On 05/08/13 22.12, Glenn wrote:
> How can they SPICE model two distinct serially connected resistors (Rls,
> Rcs - respectively Rll, Rcl) inside a power MOSFET? Are they kidding us
> ;-) If so is that useful in the model?:
>
>
> A Low-Cost Class-E Power Amplifier with Sine-Wave Drive - Caltech:
> http://www.its.caltech.edu/~mmic/reshpubindex/papers/ClassE.pdf
> (pdf-page 3)
>
> -
>
> Is it possible (how?) to measure the internal parasitic components with
> a homemade impedance bridge?:
>
> An Inexpensive Impedance Bridge:
> http://www.rfcafe.com/references/qst/inexpensive-impedance-bridge-jul-1944-qst.htm
>
>
> Can this be used to measure the guts of a power MOSFET?:
>
> http://www.sdr-kits.net/
> A Low Budget Vector Network Analyzer for AF to UHF
> http://sdr-kits.net/DG8SAQ/VNWA/baier_VNWA10_QEX.pdf
> DG8SAQ Vector Network Analyser - VNWA2.x Description
> http://www.sdr-kits.net/VNWA/VNWA_Description.html
> http://www.mydarc.de/dg8saq/VNWA21/index.html
>
> HP4194A is not within my range. Can HP4194A automatically deduce the
> power MOSFET guts?
>
> -
>
> Power MOSFET IRFP450LC, SiHFP450LC - Vishay:
> http://www.vishay.com/docs/91231/91231.pdf
> IRFP450LC (IRF?):
> http://datasheet.octopart.com/IRFP450LC-Vishay-datasheet-58277.pdf
>
> /Glenn

Can somebody give some hints?

/Glenn