Help me find a thread

[hjelm]

Hi all,
I seem to remember a thread about current mirror topologies. I think peranders was involved and there was some discussion about first cycle distortion, not sure though.
Finally someone ranked the topologies.
Does anyone remember?

BTW. I really think the searchengine isn't that good.
If it could at least point to the page where the search criteria could be found.
I have searched for this thread and if i narrow it down to one page of hits i cannot find it and if i search broader i get almost every thread there is but maybe i am just too stupid.

[Tazzy]

Search by user or in the archives?

[hjelm]

Both.
Peranders is a too busy poster too look through all his entries and even if i add current mirror to the search i cannot find it. I wonder if he didn't mention the words in his post does it show up anyway, i.e. if i search for a user in a thread that contains current mirror and the user never used those words in his posts will i find it then?

Afraid i cannot remember any other keywords that could help. I was hoping someone would remember the posts better.

[tool49]

Was that the one?

First cycle distortion - Graham, what is that?

My search was done using google with the following words:
peranders diyaudio current mirror

and it's the second hit

Sébastien

[hjelm]

Thanks but no, i seem to remember the thread being short and only containing the discussion on current mirrors, something about suggestions to improve an amplifier with current mirrors by replacing them with either cascoded or double ones.

I also tried Google but to no avail.



Big thanks to anyone that has tried to help me!

[peranders]

Was it here

Amplifier topology subjective effects

or here

Current feedback a la Mark Alexander+QRV06 = QRV03

Current feedback high speed headphone amp with diamond output buffer

http://www.diyaudio.com/forums/showt...458#post309458

What are you wondering about, different kinds of mirrors? sonnya knows more about this maybe. He has done some research for his power amp.

This is something
http://focus.ti.com/docs/prod/folders/print/ref200.html

[hjelm]

Thanks but it was none of them. I will start asking the questions i have directly instead since no one can accuse me of not trying to search before posting .

I had something i thought was very good, built with wilson current mirrors but it turned out i had done an error in my simulations, though the actual result wasn't too bad even with the errors.