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Old 28th June 2006, 12:20 PM   #1
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Default Constant Voltage Impedance Measurement

Does anyone have a good source of info on constant voltage impedance measurements. I've always used the constant current method, but would like to try constant voltage. Any links or schematics would be most helpful.

G.
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Old 28th June 2006, 01:13 PM   #2
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If you are prepared to offer a bit of feedback, email me your email address and I will send you a document I have written.
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Old 28th June 2006, 01:20 PM   #3
Davey is offline Davey  United States
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Here's one that pops to mind:

http://www.t-linespeakers.org/tech/c...rer/index.html

Davey.
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Old 28th June 2006, 07:10 PM   #4
Svante is offline Svante  Sweden
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Why do you find that interesting?

IMO there is no difference between the two (if I understand what you mean correctly) possibly apart from noise sensitivity (which normally isn't an issue).
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Old 28th June 2006, 07:59 PM   #5
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Quote:
Originally posted by Svante
Why do you find that interesting?

IMO there is no difference between the two (if I understand what you mean correctly) possibly apart from noise sensitivity (which normally isn't an issue).

Well...I'm interested in adding some drivers to LEAP using their LTD model which requires that the drivers be measured with a constant voltage rather than constant current (you need a voltage curve and an impedance curve).

G.
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Old 28th June 2006, 09:06 PM   #6
Svante is offline Svante  Sweden
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Quote:
Originally posted by Gcollier



Well...I'm interested in adding some drivers to LEAP using their LTD model which requires that the drivers be measured with a constant voltage rather than constant current (you need a voltage curve and an impedance curve).

G.
Ah, ok. Well Leap is as I understand it pretty advanced, so maybe they have good reasons for that.
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Old 28th June 2006, 09:53 PM   #7
forr is offline forr  France
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See d'Appolito's book. No real difference between constant current, constant voltage or constant resistance as long as the domain remains small signals.
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Old 29th June 2006, 09:54 PM   #8
Svante is offline Svante  Sweden
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Quote:
Originally posted by forr
See d'Appolito's book. No real difference between constant current, constant voltage or constant resistance as long as the domain remains small signals.
Yes, that is my thinking too, but here the software obviously required a specific format of input, so that would be a good reason to make the measurements as required.

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