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Old 5th January 2004, 10:36 PM   #1
JohnW is offline JohnW  Hong Kong
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Default AES17 Filter schematics

Hi,

The AES17 Low Pass filter Specificationhas been drafted by the Audio Engineering Society, to reduce out of band noise when measuring Noise Shaped DACís.

Does anybody have the schematics (or know where I can locate it) for the S-AES17 Filter Set (20KHz & 40KHz Low RF IMD Low Pass filters) Ė such as used in the Audio Precision System 2 or any ideas where I might find similar filters?
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Old 8th July 2008, 03:55 PM   #2
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Are people still trying to acquire this filter response? I designed on a few years ago when I worked for Boston Acoustics. It was a pretty large design. The filter order was above ten. Since it was so high, component values/tolerances became immensely critical. The OP Amps chosen, the PCB layout, and supply rails all played a crucial roll in the filter response as well. It took me at least 1.5 years to get the design done, built, assembled and tested. This circuit was not simple. If I were to recreate it, I'd build them up and sell them for some serious cash. The circuit would have to be different though since I already did one for a company I once worked for.
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