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12th March 2007, 03:10 PM
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#1 |
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diyAudio Member
Join Date: Sep 2005
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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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12th March 2007, 04:14 PM
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#2 |
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diyAudio Member
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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 |
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12th March 2007, 04:28 PM
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#3 |
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diyAudio Member
Join Date: Apr 2006
Location: Reykjavík
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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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12th March 2007, 05:58 PM
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#5 |
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diyAudio Member
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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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12th March 2007, 06:02 PM
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#6 | |
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diyAudio Member
Join Date: Apr 2006
Location: Reykjavík
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And as I said:
Quote:
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13th March 2007, 02:13 PM
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#8 |
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diyAudio Member
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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. Regards Jürgen |
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