| On 22 May 2004 06:45:46 -0700,
[email protected] (Steve Hill)
posted this:
|
| >Can anyone tell me how I should be calculating Parasitic Inductance,
| >Resistance and Capacitance? Any equations would be helpful. I am
| >revising for a telecommunications module and can't seem to find
| >anything anywhere and with no answers to work with, I am confused
| >whether I am doing it right.
| >
| >Typical question:
| >A 10.1nH inductor at 1GHz is purely resistive. The measured value of
| >resistance is 127ohms. Calculate the parasitic capacitance. [2 Marks]
| >
| >
[email protected]
| >
| >Thanks all.
|
| Post ALL the questions. We'll give you the answers and you'll ace the
| test!
|
| For this one: The only way the inductor can look like a resistor is
if
| it is resonant at the applied frequency. A resonant circuit will have
inductive
| and capacitive elements with identical impedances, of opposite signs,
of course.
| Calculate the impedance of the inductor at the applied frequency and
then
| calculate a value for the parasitic capacitance that will have the
same
| impedance at the same frequency. That resistance value given in the
question is
| either a red herring or the thickness of your skull.
|
| Perhaps you should switch your career goals over to something like
| business administration or sales. "Do you want fries with that order,
Sir?"
|
| Jim
|
Well.... I got it wrong......
By the way the correct question is. "Do you want chips with that?"
DNA