Dear Colleagues, I would like to know if anyone has experience in quieting an IDE interface and if there are any good design guides.
Here is the scenario: I have a system that has a HDD and DVD on the IDE interface. My system clock runs at 54MHz and I am having problems in the 120-125MHz range (+3dB over). I can suppress these frequencies by using a ferrite on the ribbon cable by this is not an acceptable design. I need to go into another layout spin with a solution to get at least 6dB attenuation. Radiation seems to be coming from the point at which it leaves the motherboard. I am going to go into the dirt to fix this, but I would like to know if anyone has seen this before. Does anyone know of good termination schemes for IDE or best place to put beads. Anything is greatly appreciated. Sincerely, Daniel J. Pierce Sr. Design Engineer OpenGlobe, Inc. > (An Escient Technologies Affiliate) 6325 Digital Way Indianapolis, IN 46278 mailto:[email protected] P: (317) 616.6587 F: (317) 616.6587
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