I am completely new to transistors and LABVIEW and i need HELP!!

[RavensFan · Accepted solution]

I don't think Lynn was saying that you were asking for people to do your homework.  Just giving tips on the best way to learn and and to get good help.  There are many people who post questions on these forums who do basically want people to do their homework for them and aren't willing to learn themselves.  I didn't get that negative impression from you message, and I don't think he thought that either.  I think his message was to give positive advice and wasn't meant to be a criticism.

As for your question about the temperature.  Those appear to be some sort of conversion factor used in the equation to relate the threshold voltage to the temperature of the transistor.  They probably show up on some datasheet for the electrical properties of the transistor.  I'm not an electrical engineer, so I don't know the details of that equation.

[thess]

thank you all guys for your help!!! problem solved!!! i am just starting so i have so many questions in my mind! i study and study and i feel like climbing a mountain!!

anyway!! thank you all again!!! you are all too kind!!!

[Rod42]

The other "random" number (1.6e-19) is approximately the value for the elementary charge. The code you inherited could (should) represent this in a more readable, and more accurate, way by using "elementary charge" from numeric -> Math Constants pane.

(But as the VI converts C to K by adding 215, the accuracy argument may not be relevant!)

May you continue to learn and enjoy LabVIEW.

Rod.

[johnsold]

In your formula Vt = kT/q, where k (Boltzman's constant) = 1.38.. E-23 J/K, T (absolute temperature) = 273... + T(°C), and q (elementary charge) = 1.60.. E-19 C.

Lynn 

[F._Schubert]

Well, EE is a very abstract sience, independent of you do analog or digital, if you are a boy or a girl. For a brief summary, always try the wikipedia, here you will find the formula from your code (and much more). You also might find some nice text books in an university library.

Generally, try to have fun in the job you do.

For LV, you're right here on the biggest resource of knownledge and welcomed by all to ask any questions.

Felix

[thess]

 you are all so helpfull!! thanks for your time and your patience!!!

thanks again!! thanks so much!!