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Old 26th May 2009, 02:57 PM   #1
3nity is offline 3nity  Austria
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Question 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?
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Old 26th May 2009, 03:01 PM   #2
h_a is offline h_a  Europe
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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
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Old 29th May 2009, 03:28 PM   #3
3nity is offline 3nity  Austria
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Sure.
In the input stage, maybe?
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Old 29th May 2009, 09:09 PM   #4
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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"

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Old 31st May 2009, 05:14 PM   #5
3nity is offline 3nity  Austria
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I had this...
Click the image to open in full size.

Any opinion/suggestion welcome.
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Old 31st May 2009, 06:19 PM   #6
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Default Hi!

Single supply?????

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Old 31st May 2009, 08:16 PM   #7
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Default Re: Hi!

Quote:
Originally posted by zeonrider
Single supply?????

Regards zeoN_Rider

look again

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Old 1st June 2009, 04:00 AM   #8
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Quote:
Originally posted by 3nity
Any opinion/suggestion welcome.
This is unlike current mirrors with which I am familiar.

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Old 1st June 2009, 06:57 AM   #9
h_a is offline h_a  Europe
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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
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Old 2nd June 2009, 11:04 AM   #10
3nity is offline 3nity  Austria
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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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