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What does this notation mean?

Posted 7 août 2012, 08:54 UTC−4 Low-Frequency Electromagnetics, Parameters, Variables, & Functions Version 4.0, Version 4.0a, Version 4.1, Version 4.2, Version 4.2a, Version 4.3 2 Replies

Martin Hediger
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Dear Comsol users
In the document

www.pksez1.com/Modeling_PIN_Photodiodes.pdf

which describes the simulation of a PIN diode, the author writes in Table 2 for the doping concentration N the expression:

N = NDn + NDnmax*exp( -((y+y1)/ch)^2 ) - NApmax*exp( -( y/ch)^2 )*( (abs(x) < ac/2) + (abs(x) >= ac/2)*exp( -((abs(x)-ac/2)/ch)^2) )

I would like to ask how to read the "conditional part" containing the comparison operations '<' and '>='. These, logically, evaluate to 'true' or 'false', in my world.
What kind of effect do they have here?

Thanks for any hints and advice.

Martin
2 Replies Last Post 7 août 2012, 11:15 UTC−4
John H.
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Posted: 1 decade ago 7 août 2012, 10:15 UTC−4
Logical expression that are "true" evaluate to 1, those that are "false" to zero.
Logical expression that are "true" evaluate to 1, those that are "false" to zero.
Martin Hediger
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Posted: 1 decade ago 7 août 2012, 11:15 UTC−4
I see. Interesting, so i understand it the operators '+' are overloaded in such a context.
I see. Interesting, so i understand it the operators '+' are overloaded in such a context.

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