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Old 25th July 2012, 11:44 AM   #31
EUVL is offline EUVL  Europe
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I thought you already built P2P ?




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Old 25th July 2012, 12:12 PM   #32
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No, but i used the same principle in a phono stage. It works, that what i know.
I am waiting for the MosFets.
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Old 25th July 2012, 12:19 PM   #33
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The mosfets just came. Now i have everything to build it.
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Old 25th July 2012, 12:26 PM   #34
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This is approximately the input stage of the bespoke phono.
The problem is not new to me and this is a topology that can be used more universal.
So when the request came up to make a simple Bal-Umbal converter i already had a solution. I used current mirrors though.
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Old 25th July 2012, 12:39 PM   #35
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I know you like current mirrors.
I like the simplicity of cascodes.

Matter of taste.


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Old 25th July 2012, 12:51 PM   #36
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I do mostly mirrors. MiiB, Sigurd and i have researched them now to a point where they virtually introduce no distortion. It is more complex then a cascode Widlar or Wilson though.
I use folded cascodes too but instead of the drain resistors i use constant current sources.
They have their problems too like noise but that can also be solved. One of the reasons i went so far with mirrors is that the folded cascode is very well researched and we have
very good and mature examples like the Blowtorch. I simply wanted to try something new. Driven cascodes are also very interesting and i found new ways to implement them. Lets see what will happen in the future. Electronics design is certainly still moving
forward.
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Old 30th July 2012, 12:00 PM   #37
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Joachim,

Schematics and Infopak already sent to you by email, as requested.


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Old 30th July 2012, 05:09 PM   #38
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Thanks, i have now all that i need.
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Old 31st July 2012, 09:44 AM   #39
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Not quite.
PCBs on their way.




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Old 31st July 2012, 01:01 PM   #40
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That looks very good ! I am looking forward to make it play.
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