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day_2_10-15-2015 [2015/10/28 06:52]
admin
day_2_10-15-2015 [2015/10/28 06:59] (current)
admin
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 The above equation is just a straight line, so the math is easier to work with. To get $KP_n$ and $V_T$, just solve the two equations two unknowns from the model data. This is not the most physcally correect thing to do.  The model does not follow the square law exactly due to secondary effects like mobility degredation and series resistance. ​ Atleast for DC operating point problems this will make the hand calculations the most accurate.  ​ The above equation is just a straight line, so the math is easier to work with. To get $KP_n$ and $V_T$, just solve the two equations two unknowns from the model data. This is not the most physcally correect thing to do.  The model does not follow the square law exactly due to secondary effects like mobility degredation and series resistance. ​ Atleast for DC operating point problems this will make the hand calculations the most accurate.  ​
  
-I used values of $V_{GS}$=1.5 and $V_{GS}=4.0$ to generate the model seen below. ​+I used values of $V_{GS}$=1.5 and $V_{GS}=4.0$ to generate the model seen below. ​$KP_n$=7.64e-5 and $V_T$=0.602
  
 +{{:​model_extract.png|}}
  
 +The red line is the SPICE model and the blue line is the square-law model that was just extracted.  ​
  
day_2_10-15-2015.txt ยท Last modified: 2015/10/28 06:59 by admin