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Old 10th November 2008, 07:09 PM   #51
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Old 10th November 2008, 08:51 PM   #52
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Default Re: Re: Re: Fast Class A Amp

Quote:
Originally posted by Nico Ras


Thank you for your comments I will check your advice. The input impedance of the amp is low (2k Ohm) as it is driven from a known source.
Hi Nico,

OK, a couple of questions for you:

- Is the amp fully balanced like, for example Bruno's ExtremeA

- The very low IP Z suggests a virtual ground input Is this the case?

cheers,

Terry
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Old 7th January 2009, 12:24 PM   #53
AMV8 is offline AMV8  United Kingdom
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Nico

Congratulations on your amplifier design. I wish I could design an amplifier to even a close approximation of what you have achieved.

I hope you can give some information later but I do appreciate that you may be completely limited by the contract you signed. I am an engineer and I am also a lawyer so I understand that a contract obligation needs to be adhered to.

None the less any hints on the directions that audio amateurs, such as myself, should be looking in would help. You could maybe list the 5 or 6 aspects of the design or layout that you thought contributed most to your achievement. That would help some of us a lot.

It souds as though you now need a loudspeaker to match your amplifier design as the loudspeaker is likely to be the weakspot in your system now.

Congratulations.

Don
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Old 7th January 2009, 06:59 PM   #54
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Hi Guys,

The project is now over. There were six companies contracted that we know of, but we do not know whose design will eventually prevail. But the IP to this particular R&D project belongs to ...

It was not a discreet hi-fi but the circuit is earmarked for a audio chip for high-end TV receivers 35 to 50 watt and OLG of the amp is about 100 dB.

The design was based on a 15 MHz linear amplifier I did and found in a very respectable function generator of about 18 years ago.

I am working on another low power amp that will use a similar topology and I intend to post it on this forum when completed.

Obviously this will be in the public domain and DIYers can use it as they see fit.

Thanks for the interest anyway.

Nico
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Old 8th January 2009, 09:35 PM   #55
lineup is offline lineup  Sweden
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You are a great guy, Nico
I like you.

Yours
Lineup
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Old 9th January 2009, 12:32 AM   #56
KLe is offline KLe  Australia
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Thank you Nico ... very interesting indeed
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Old 9th January 2009, 03:26 AM   #57
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SN = -130db = 0.000000316V = 316nV
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Old 11th January 2009, 04:29 PM   #58
darian is offline darian  France
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Hello Nico,

After all the buzz around your amp and its claimed stellar performances, the least I can say is that I am waiting for your schematic with bated breath! Thank you for deciding to share!

Regards
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Old 11th January 2009, 09:22 PM   #59
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Quote:
Originally posted by darian
Hello Nico,

After all the buzz around your amp and its claimed stellar performances, the least I can say is that I am waiting for your schematic with bated breath! Thank you for deciding to share!

Regards
I am returning to work tomorrow after my summer vacation and will use the next two or so weeks to knock together a public domain system for those DIY guys who would like to tamper with a real world circuit.

I must admit in the past few weeks some interesting output stages cropped up that I may want to include in the circuit as there is some real merit in lazy cat's output stage. I have also looked carefully at the Dunlap output and am thinking to maybe combine these features into an interesting design.

It would be a new thread with PCB layout and participation from you all I hope and it will be a DIY Audio amp by the DIY Audio crowd in its own right.

Kind regards

Nico
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Old 18th March 2013, 07:01 PM   #60
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Hi Nico, what happend with this amp?
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