[JohnFerrier]

Here's another interesting app note that analyzes Diamond Buffer circuitry: http://focus.ti.com/lit/an/sboa071/sboa071.pdf

And, hey, my half diamond circuit is there too (fig. 10).

BTW: The Walt Jung article, that tangent references, helped take mystery out of understanding discrete buffer circuits.


JF

 

[peranders]

I have made a small and cute Daimond buffer with all SMD parts, including the power transistors. The difference compared to the Jung Buffer is that I have used cascodes. This design is totally free from my side including the gerberfiles and if there is some interest I will make pcb's, double sided and with groundplane. The dimension is 1.3 x 1.4 " approx.

 

[tbla]

Quote:

FREE

you should tell fred......

 

[peranders]

Quote:

Originally posted by tbla you should tell fred......

he, he. I'm full of surprises...

A sneak preview is available. If you can't find it, send me a message.

EDIT: I have now got a couple of very cute pcb's which are waiting for parts....

 

[peranders]

I have tested my micro diamond buffer today.

Rise tíme less than 10 ns. I can't see any difference between input signal and output signal. This buffer fast......

400 mA peak (at least) at +- 15 volts

Noise floor below -110 dB (less than the soundcard)

Offset 7.8 mV

Dist less than 0.009% Can't see any difference between the soundcard alone and the buffer. Walter Jung mentioned in his article dist down to 0.002% which seems to be true.

Those of you who want to see the RightMark results, send me a message.

Picture will come in a few days.

 

[Voodoochile]

That's cool news, peranders... can't wait to see it.

 

[peranders]

Picture here, not so good but better is coming.
http://www.diyaudio.com/forums/showt...threadid=22598

 

[peranders]

Picture here but I will change it to a with studio lighting.
EDIT: Which is done now. Picture taken with a simple digital camera, Minolta Dimage F100

 

[jboehle]

Has anyone built Peranders buffer? I did the currency conversion, looks to be about $7 US for the board, I don't know how much shipping is to the US.

ppl: How does it compare to the one you are working on?

-Jason

 

[peranders]

Noone has built it besides myself. Shipping is around 3-4 USD I think. But notice that there is only one channel at the pcb.

EDIT: Now there are six more units (soon built)

EDIT2: A couple of more buffers are built without problems, still not a huge success though...

 

[peranders]

Quote:

Originally Posted by tbla can't find it....where is it....?

You can surf to Walt Jung's website. There you have info about the Jung Super Regulator.

http://home.comcast.net/~walt-jung/w...7s-20PDFs.html

 

[ppl]

another great link i could not find for the first articial. This app note on the Care and feeding of unity gain buffers is a must read and gives insight as to things like the reason for the Resistor between the opamp output and Buffer input. The Note also covers closed loop topologies as well as conventionial open loop Dimond Buffer. http://www.intersil.com/data/an/an1102.pdf

 

[Sovkiller]

Phil is that rriad diamond buffer in your signature a new board, any link to it?????

 

[ppl]

Hear is a simple explination of how a Dimond buffer works.
http://www.allaboutcircuits.com/vol_...itter_follower

 

[The Speaker Guy]

The Maxim circuit in the original post is mine! I've blown it up a few times, as I drive it with a function generator into capacitive loads.

I never meant it to be used for audio, but you can tell my frame of mind when I designed it. Has anyone used the circuit?