/rambling preamble
My reading on transconductance goes back to Ia/Vg Curves, chasing
linearity on valves (as advanced a science as surfing tidal waves)
and such 'prehistoric' notions.
My current requirement is in switching circuitry, and particularly,
replacing fets in switching circuitry. This stems from the fact that the
local supplier who has the parts today (instead of the day after
tomorrow) fails to discriminate between logic level fets and ordinary
ones, beyond simply specifying the gfs. The gfs cannot be explained to
me by 'tech support', needless to say.
/end of rambling.
Now, the question: Can I convert the figure specified in Siemens to a
gate turn-on voltage range? This becomes interesting if I am trying to
specify an equivelant to a blown fet and know the gate voltage. If I
match the typical figure is that enough? Does a higher Siemens value
mean a higher gate turn-on voltage? (Presume typical values are quoted)
It is much quicker to match to what _is_ available, than to wait for
what is not.
Further, a Siemens is defined as 1 amp per volt. Does the Siemens figure
take the current of the device into the calculation? If one device is
specified at 4 Siemens, and another at 8, what is that telling me?
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
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