Effective model for MOSFET channel resistance, etc.

Real(VDS*ID)

...Jim Thompson

Let me try this again.

Calculating the actual power dissipation isn't what I want to know. Finding a typical model for a MOSFET is what I'm looking for - like what LEVEL to use, or what a good value to use for LAMBDA or XJ is - because all (or at least most) of these parameters modify ID - thus changing the channel resistance.

I can find a lot of info about, say for example, what the equation SPICE uses to calculate the threshold voltage and what the default value for PHI is, but I can't find any suggestions for what a typical value for CBGO is, etc. etc.

Is this more helpful?

ERY

Surf back thru Usenet looking for references to 2N7000, which Win Hill has modeled.

Win has taken a crap Level=3 model and added a subcircuit to make it more accurate.

My preference is Level=7, but it's rare to find discrete devices modeled that way.

Unfortunately my model repertoire only includes integrated circuit devices.

...Jim Thompson

Oh, and one more thing.

There have been a few places where I've found information on power MOSFETs, but my application leans more on a low voltage analog signal that can be unity gain or close enough to unity.

Basically, my research involves looking at the power dissipation of typical CMOS logic versus a differential logic with CMOS that involves analog signals - I could go more in depth into my research but it's unnecessary. This 'differential logic' that I'm looking into isn't the end goal, it's just meant to be a good example of getting energy savings with a sinusoidal stimulus. Anyway...

Thanks again,

ERY

Jim,

Thank you.

That right there made my day.

ERY