ANK AudioKits Forum

ANK AudioKits support forum

Audio Note Kits Forum

RE: I/V transformer

84.28.24.179

In Reply to: RE: I/V transformer posted by RGA on May 07, 2010 at 18:34:47

I read it but its not an anwere on my question
in fact they say notting in that article
only that it sounds better
I believe that
But i dont untherstand the IV conversion.

Follow Ups:

RE: I/V transformer - ford07 05:19:33 05/08/10 (2)
Horny

I believe this paragraph in the Andy Grove's article answers your question. The short answer is the IV tansformer provides current to voltage conversion. Thanks for posting the link RGA.

"The output of most resistor ladder DAC chips is in the form of a current rather than a voltage. There are many ways to convert the current into a voltage but the most commonly used system is that of an op-amp connected as an I to V converter. This system requires the use of a high degree of feedback, and as a result there are problems associated with it. One of those is internal slew rate limiting of the op-amp itself. The rate of change of current at the output of even an audio DAC is very fast indeed. Even modern fast op-amps will slew limit internally and that affects sound quality. Some engineers have found that using extremely fast op-amps improves the sound quality, but we have completely sidestepped the issue by using a transformer I/V system. The transformer not only provides an I to V function but the way it is used in our latest DACs transfers maximum energy from the DAC chip itself. This in itself reduces overshoot and ringing and because the system is slightly overdamped the rise time is reduced to an acceptable rate as well."
- RE: I/V transformer - horny 07:21:22 05/08/10 (1)
  hello Ford07
  I think if you convert current into voltage you get lower voltage before the transformer and transform it to a higher level.
  I measure 0.18v before the transformer and the same level on the secondairy�s this is a 1:1 transformer there is only a galvanic isolation this way and maybe a filter working.
  But maybe i thinking totaly wrong i try to understand it.
  - RE: I/V transformer - GTCharlie 19:17:34 05/08/10 (0)
    i think it filters out high freq noise from the DAC chip. in lower model AN DACs they just use C to ground.

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors:

VH Audio