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-   -   Diamond buffers (http://www.diyaudio.com/forums/parts/97959-diamond-buffers.html)

Nordic 12th March 2007 03:10 PM

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...

Juergen Knoop 12th March 2007 04:14 PM

I´m curious too!
don´t 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

kristleifur 12th March 2007 04:28 PM

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.

Nordic 12th March 2007 05:04 PM

Like I said, getting a circuit no problem, but what does it do?

Juergen Knoop 12th March 2007 05:58 PM

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.

kristleifur 12th March 2007 06:02 PM

And as I said:

Quote:

Check the head-fi.org and headwize.com forums for more info.

hifimaker 13th March 2007 01:58 AM

Do a google search for Jung Diamond buffer. You will find the source documents by Walter Jung.

-David

Juergen Knoop 13th March 2007 02:13 PM

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.
Regards
Jürgen


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