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buffered SPDIF input stage for BIII

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Joined 2009
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This buffered SPDIF input stage designed by Jocko Homo can avoid dropouts in my Buffalo III?

Rz 100R
R1 300R
Cz 4,7pF/5pF

Hex Inverter used Phillips 74HC04N instead of 74HCU04, operating voltage between +5V

Is there is a way to improve the schematic or needs other operating voltage, suggestions will welcome.
 

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