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Old 12th March 2007, 03:10 PM   #1
Nordic is offline Nordic  South Africa
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Default Diamond buffers

Ok, stupid question time, what exactly is a diamond buffer.

It looks to me at first glance like a way of keeping the power rails balanced like a resistor divider except, it is on the output side?

I can find many pages with PCBs and diffirent diamond buffers, but none of them clearly tell me what the hell I should do with one if I built it, what are the limitations? If it does sit on the output side I would imagine power limits...

Please connect a few dots... I'm a quick study normaly, I promise...
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Old 12th March 2007, 04:14 PM   #2
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Im curious too!
dont know exactly what a diamond buffer is, but it maybe referencing to these pushpull-emitter followers,
where two emitter followers, one npn - one pnp, symmetrically drive a AB-pushpull output stage.
Regards
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Old 12th March 2007, 04:28 PM   #3
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On page two of this PDF is a schematic of a diamond buffer:

http://tangentsoft.net/audio/ppa/amp...schematic8.pdf

They're pretty popular for headphone amplifiers. Check the head-fi.org and headwize.com forums for more info.
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Old 12th March 2007, 05:04 PM   #4
Nordic is offline Nordic  South Africa
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Like I said, getting a circuit no problem, but what does it do?
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Old 12th March 2007, 05:58 PM   #5
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it is used to provide more output current to a given voltage source, i.e to "buffer" it.
Think of it as a more elaborate emitter follower.
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Old 12th March 2007, 06:02 PM   #6
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And as I said:

Quote:
Check the head-fi.org and headwize.com forums for more info.
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Old 13th March 2007, 01:58 AM   #7
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Do a google search for Jung Diamond buffer. You will find the source documents by Walter Jung.

-David
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Old 13th March 2007, 02:13 PM   #8
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ok, I did it...
But why this is called a diamond buffer?
My textbook refers these circuits as push-pull emitter followers widely used in integrated circuits.
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Jrgen
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