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Old 26th September 2007, 01:49 AM   #21
djk is offline djk
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http://www.audiodesignguide.com/my/Cool_Follower1.GIF

Wireless World

It was in October 1976 Wireless World page 74

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Old 26th September 2007, 02:56 AM   #22
anatech is offline anatech  Canada
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Hi djk,
Cool!

I think I've seen these "original and never seen design" before. Unfortunately for Andrea Ciuffoli, most have been designed in principle in other equipment. I have never received Wireless World before either. Too bad, it looks like it was a great publication.

At any rate, I doubt strongly that it's possible to design anything these days that hasn't existed in some form earlier on in time.

-Chris
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Old 26th September 2007, 05:46 AM   #23
PMA is offline PMA  Europe
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Hi Hugh and Chris,

thank you, I should add that the circuit is just a hint and should be precised into reliable circuit, the most important addition would be the DC offset stabilization.

Hi djk,

thanks for the link, I have not known it. Of course I have not invented the structure, it is based on diamond buffer and basic CFB topology. We must be, however, careful when comparing these circuits. The major difference is current output. Some circuits look similar at first look, but do not work the same way.

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Pavel
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Old 26th September 2007, 06:02 AM   #24
PMA is offline PMA  Europe
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Simulated 10kHz square response into 8ohm load looks like this:
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Old 26th September 2007, 06:20 AM   #25
PMA is offline PMA  Europe
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Pavel (mefistofelez),

you have made a good point. I hope this circuit might be suitable for your application. Are you visiting Prague at the end of the year?

Best,
Pavel
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Old 26th September 2007, 12:24 PM   #26
sajti is online now sajti  Hungary
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Quote:
Originally posted by djk
http://www.audiodesignguide.com/my/Cool_Follower1.GIF

Wireless World

It was in October 1976 Wireless World page 74

This is quite nice circuit, but it will be better with bootstrapping the drivers!

sajti
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Old 26th September 2007, 05:35 PM   #27
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Pavle,

Quote:
Are you visiting Prague at the end of the year?
Unless I want to be disinherited, yes. ;-) I will let you know when I have a firm date.

Given your concurrence with my reasoning, I hope that you will find the amplifier worthy of your time and develop a functional prototype.

Kindest regards,

M
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