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Old 23rd May 2010, 01:21 PM   #1
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Default Playing with Nelson's puzzle.

Hi all,

I do dot know if this has been already done...


Derivated from the Aleph j schematic:
Taking the lower half of it and drawing its symetrical as upper half.

I think it should work, though a question remains to me about the feedback: Do we need a leg to ground at the inverting input? (Jfets gate)
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Last edited by bobodioulasso; 23rd May 2010 at 01:25 PM.
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Old 23rd May 2010, 04:03 PM   #2
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already done , and even not just by Papa

dunno where was that posted , few years ago

anyway - F5 is practically same ........ with Spice ( and I'm not meaning on sim prog )
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Old 23rd May 2010, 06:44 PM   #3
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To answer the question, a matching resistor to ground would
give the circuit a better CMRR on the balanced input.

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Old 23rd May 2010, 07:12 PM   #4
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Thanks for your reply, Nelson.
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