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Are DAPs ideal(or not) voltage source or current source,How can I model they in my calculation?

post #1 of 4
12/7/11 at 1:15pm
Thread Starter 

Hi,

I curious about this topic,If there are articles or discussions about on it,links are welcome.

If know the answer,it is also welcome.

I use them for modelling on LTspice computer program.

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post #2 of 4
12/7/11 at 1:52pm

Nothing's ideal.

 

They're like any source.

 

You can represent them as a voltage generator with an internal impedance. Most players are intended to drive headphones and have an impedance ranging from a couple of hundred down to a few ohms.

 

w

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post #3 of 4
12/7/11 at 2:21pm

and most have a output C that gives measurable low frequency roll off with lower Z cans

 

I have used the 1st gen Shuffle for a lab test source since it is DC coupled

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post #4 of 4
12/7/11 at 2:37pm
Thread Starter 

Thank you for good answers.

As I understand from answers:

DAPs can be modelled like voltage source with a HP filter and LP filter with internal resistance.

Filter values can be  calculated from specifications.

I think  that they are very good assumptions.

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