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-   -   Current mirror for the aleph? (http://www.diyaudio.com/forums/pass-labs/144779-current-mirror-aleph.html)

3nity 26th May 2009 02:57 PM

Current mirror for the aleph?
 
Hi,

Is it possible to have a current mirror to feed the output stage in the aleph 3? Any benefit?

h_a 26th May 2009 03:01 PM

What do you want to use the current mirror for? To what purpose? The Aleph-current source can be seen as a single transistor gain stage with a single transistor current source - it's just the real world that needs some paralleled fets in this position.

Have fun, Hannes

3nity 29th May 2009 03:28 PM

Sure.
In the input stage, maybe?

Nelson Pass 29th May 2009 09:09 PM

Perhaps you would like to post a picture of what you have in mind
for greater clarity. There are a couple of ways to interpret "current
mirror"

:cool:

3nity 31st May 2009 05:14 PM

I had this...
http://i41.photobucket.com/albums/e2...leph3_w_cm.gif

Any opinion/suggestion welcome.

zeonrider 31st May 2009 06:19 PM

Hi!
 
Single supply?????

Regards zeoN_Rider

Zen Mod 31st May 2009 08:16 PM

Re: Hi!
 
Quote:

Originally posted by zeonrider
Single supply?????

Regards zeoN_Rider


look again

:rofl:

Nelson Pass 1st June 2009 04:00 AM

Quote:

Originally posted by 3nity
Any opinion/suggestion welcome.
This is unlike current mirrors with which I am familiar.

:cool:

h_a 1st June 2009 06:57 AM

Maybe you want to rework your drawing a bit, at the moment it looks more like a signal modulated cascode ;)

May I ask you what your idea behind using a current mirror is? More gain and more feedback? Or just playing around a bit?

Have fun, Hannes

3nity 2nd June 2009 11:04 AM

Just playing around.



Quote:

originally posted by h_a
Maybe you want to rework your drawing a bit, at the moment it looks more like a signal modulated cascode
You mean by having emitters and collectors reversed, right?

Quote:

originally posted by Nelson PassThis is unlike current mirrors with which I am familiar.
Is it not the same fashion as the output stage (the sources feeding the drains) ?



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