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Old 16th October 2012, 03:31 PM   #261
Stefanoo is offline Stefanoo  Italy
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But seriously, I can't make that circuit work for some reason.
Have you tried yourself to simulate it?
Did you succeded?
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Old 16th October 2012, 03:41 PM   #262
Joachim Gerhard is offline Joachim Gerhard  Germany
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Stefano, have you tried to make both voltage sources at the input positive ?
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Old 16th October 2012, 03:46 PM   #263
Stefanoo is offline Stefanoo  Italy
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Quote:
Originally Posted by Joachim Gerhard View Post
Stefano, have you tried to make both voltage sources at the input positive ?
I just tried all 4 combinations for the 2 input generators, but it doesn't seem to work.
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Old 16th October 2012, 03:58 PM   #264
Joachim Gerhard is offline Joachim Gerhard  Germany
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There was a guy, i think his avatar is Elso Quack, that worked with this circuit.
I think he has his own blogg now so you have to find him.
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Old 16th October 2012, 04:16 PM   #265
MiiB is offline MiiB  Denmark
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I would make it like a two stage.. first stage with the high-cut part of riaa between the legs...then folded over in the opamp.. with a local feedback there making the base part active.

You generators are canceling... so both legs are seeing the same signal. need to phaseshift one 180 degrees.
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Old 16th October 2012, 04:18 PM   #266
Joachim Gerhard is offline Joachim Gerhard  Germany
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I found him here :DIYHiFi.org • Index page
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Old 16th October 2012, 04:35 PM   #267
RCruz is online now RCruz  Switzerland
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Old 16th October 2012, 04:44 PM   #268
Stefanoo is offline Stefanoo  Italy
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Quote:
Originally Posted by MiiB View Post
I would make it like a two stage.. first stage with the high-cut part of riaa between the legs...then folded over in the opamp.. with a local feedback there making the base part active.

You generators are canceling... so both legs are seeing the same signal. need to phaseshift one 180 degrees.
Interesting concept.
Otherwise is it possible top create out of this a differential folded cascode with transimpendance RIAA? something to think about.
If I pass the hump to simulate the plain scheme I can try to work that around.


For the generators, they are out of phase.
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Old 16th October 2012, 04:44 PM   #269
Stefanoo is offline Stefanoo  Italy
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Quote:
Originally Posted by Joachim Gerhard View Post
That is the forum DIYHIFI. Did he have a topic opened?
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Old 16th October 2012, 05:16 PM   #270
Joachim Gerhard is offline Joachim Gerhard  Germany
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He is moderator there. He talked about that circuit too here on DIYAUDIO in the old times.
Sorry, i am not very helpful at the moment. Have a ton to do.
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