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23rd May 2004, 11:21 PM
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#1 |
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diyAudio Member
Join Date: Apr 2002
Location: Munich
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SAA7220 / clock - ground filtering ?
HI,
does it make sense to filter the ground with a ferrite bead or large value inductor ? Also how about a floating ground ? Opamp ? Voltage regulator ? That could be heavily filtered before the "ground regulator". Bernhard |
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24th May 2004, 05:04 AM
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#2 |
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diyAudio Member
Join Date: Nov 2002
Location: Grenoble, FR
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If you place a bead on the ground...
Imagine there's a current spike (like ezverything switches on), it's a transiant, but it's normal Here, your choke will filter this, and will "lift" the ground potential. But only the ground of the 7220. If this phenomen is big enough, a 0 at the output could even be ween ad a 1 for other devices connected to the normal ground |
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24th May 2004, 11:24 AM
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#5 | |
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diyAudio Member
Join Date: Dec 2001
Location: Eindhoven
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Quote:
As well, as I/O currents are also ground related You could however decouple all I/O but will end up with something that wont function at all What is the rationale behind wanting to add a ferrite inductor ? You probably have read to many reccommmendations from AD. TI, BB and Crystal forget about them, please......... regards |
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24th May 2004, 11:30 AM
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#6 | |
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Banned
Join Date: Dec 2001
Location: Zamboanga, City of Flowers, Mindanao
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Ad, Ti, Bb
Quote:
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24th May 2004, 02:04 PM
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#8 |
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Banned
Join Date: Feb 2002
Location: As far from the NOSsers as possible
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WHAT???
How did you come up with that idea.............?
Never mind.....I'm not that curious. Jocko |
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