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Hallo,
Is there a susceptance in LTspice, that i can direct use? thank u!
Regards
He Yang

He <he.yang@...> wrote:

Is there a susceptance in LTspice, that i can direct use?


A capacitor, or an inductor, are susceptance elements.

You might want to make sure they have no parasitic resistances, so that
your component has only susceptance and no conductance. Unless you also
want it to have conductance.

Andy

In message <CALBs-Ti=EVmQ7Kze1GxnidYUebsgYMnm-M_Ne3BY9jBsRLbA4A@...>, dated Fri, 19 Jul 2013, Andy <Andrew.Ingraham@...> writes:

Is there a susceptance in LTspice, that i can direct use?


A capacitor, or an inductor, are susceptance elements.

I think the question is whether one can enter a susceptance value in a component's properties. I'm sure this isn't possible, but;

a) you never know what is in fact possible in LTspice;

b) you can overcome it because you can calculate the capacitance C or inductance L that has susceptance B at frequency f quite easily:

C = B/(2pi*f), L = 1/(2pi*f*B).

Elastance, anyone? (;-)
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
Why is the stapler always empty just when you want it?

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

--- In LTspice@..., John Woodgate <jmw@...> wrote:

In message
<CALBs-Ti=EVmQ7Kze1GxnidYUebsgYMnm-M_Ne3BY9jBsRLbA4A@...>,
dated Fri, 19 Jul 2013, Andy <Andrew.Ingraham@...> writes:

Is there a susceptance in LTspice, that i can direct use?


A capacitor, or an inductor, are susceptance elements.

I think the question is whether one can enter a susceptance value in a
component's properties. I'm sure this isn't possible, but;

a) you never know what is in fact possible in LTspice;

b) you can overcome it because you can calculate the capacitance C or
inductance L that has susceptance B at frequency f quite easily:

C = B/(2pi*f), L = 1/(2pi*f*B).

Elastance, anyone? (;-)
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
Why is the stapler always empty just when you want it?

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

thanks John!
Actually i want to find a device, that can descript the reciprocal of 'L'(Inductor).is there the device in LTspice, or how can i definit it with k=1/L?
thank you!
He Yang

In message <ksle46+itac@...>, dated Tue, 23 Jul 2013, He <he.yang@...> writes:

Actually i want to find a device, that can descript the reciprocal of 'L'(Inductor).is there the device in LTspice, or how can i definit it with k=1/L?
thank you!

According to Wikipedia, there is not even a property name for a '1/L' device, although I seem to recall seeing the term 'inertance' a long time ago. But as far as I can see, for Spice simulation, you need neither the '1/L' device or the susceptance. The reason is that the device is still an inductor, however you describe its electrical property, so you specify its inductance in LTspice.

There may be another reason why you want to deal with '1/L', so if you could explain a bit more what you want to do, I can try to help. For example, if you want to use a list or range of 1/L values in a .STEP PARAM statement, just make the list or range end-points and step from the corresponding L values instead.
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
Why is the stapler always empty just when you want it?

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK