Philips UCD application note

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Hi, Fumac,

From your explenation, you don't use UCD topology for all your amps. In your UCD based topology, what is the voltage (p-p) of the residual output at idle?

From the "high speed mode" PCB, you explain short tracks.

Do you got other explenation/examples for drawing high speed pcb?

I see the picture of your board. You place the components on top side (while Hypex and Philips place it on bottom side, the top side is ground plane).

Do you use single or double side pcb? Do you use ground plane?
 
lumanauw said:
Hi, Fumac,

From your explenation, you don't use UCD topology for all your amps. In your UCD based topology, what is the voltage (p-p) of the residual output at idle?

From the "high speed mode" PCB, you explain short tracks.

Do you got other explenation/examples for drawing high speed pcb?

I see the picture of your board. You place the components on top side (while Hypex and Philips place it on bottom side, the top side is ground plane).

Do you use single or double side pcb? Do you use ground plane?
i used double side pcb


the voltage (p-p) of the residual output at idle
u can look this pic , about 0.175v
http://www.diyaudio.com/forums/showthread.php?s=&threadid=93787&perpage=10&pagenumber=2
 
u can watch this pic
 

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U have got the way
Congratulations ¡I

No, no congratulations. I'm in headache here. :D

Do you mean I have to redraw new PCB, with all SMD components?

SMD components are very difficult to solder.

Is it possible to use ordinary components, but still getting good result? No need 1mhz like you get, but getting 150mV residual is good enough.

Fumac, you got 150mV residual. How come the real UCD have only 20mV?
 
lumanauw said:


No, no congratulations. I'm in headache here. :D

Do you mean I have to redraw new PCB, with all SMD components?

SMD components are very difficult to solder.

Is it possible to use ordinary components, but still getting good result? No need 1mhz like you get, but getting 150mV residual is good enough.

Fumac, you got 150mV residual. How come the real UCD have only 20mV?

150mv is P2P, i dont know the ucd 20mv is rms or p2p

i will have a new test after my new PCB:)
if u like ,u can post the PCB pictures here, let me have a look:)
 
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