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Robin Clark 2010-10-09 20:08:17 +01:00
parent 3fc2688764
commit 7e6f1477d6
1 changed files with 4 additions and 2 deletions
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fmmd_design_aide/fmmd_design_aide.tex
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@ -104,8 +104,10 @@ An offset is applied to the input by R18 and R22 forming a potential divider
of $\frac{820}{2.2E6+820}$. With 5V applied as Vcc this gives an input offset of $1.86\,mV$.
So the amplified offset is $\approx 342 \, mV$. We can determine the output of the amplifier
by subtracting this amount from the reading. We can also define an acceptable
range for the readings. This would depend on the milli-volt source, and also on the
detectability of the error volatges.
range for the readings. This would depend on the characteristics of milli-volt source, and also on the
thresholds of the volatges considered out of range. For the sake of example let us
consider this to be a type K thermocouple amplifier, with a range of temperatures
expected to be within {{0}\oc} and {{300}\oc}.
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