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ADV7604 analog VGA ghost test graphic.

Question asked by BrianG on Jul 26, 2011
Latest reply on Jul 28, 2011 by BrianG

Viewing the attached image, using a PC with analog VGA, at 1280x1024 @ 60hz, full screen, I'm getting a faint negative ghosting after the vertical lines in the image.

 

I narrowed the problem down to the 36 bit data bus leaking into my analog ground.

 

Before I make any changes to my PCB, if someone could please give the image a try, espicially on Analog Devices' eval board?

 

If the eval board is completely free of the ghost, I'll choose to match it's power supply layout.

 

 

Thx.

Brian.

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