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27th August 2011, 07:38 PM
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#1 |
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diyAudio Member
Join Date: Jun 2011
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Power supply oscillation and Class D?
Hi,
Supposing an SMPS that supplies a Class D amplifier is poorly designed and has a feedback loop problem, manifesting itself as a 3KHz sine wave oscillation (peak to peak = 10V) imposed on its v(out). Could a Class D amplifier filter out the power supply oscillation and stop it from ruining the music sound.? |
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27th August 2011, 08:37 PM
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#3 |
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diyAudio Member
Join Date: Apr 2008
Location: Carlisle, England
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What smoothing capacitors do you have on the output ?
What is the switching frequency of the SMPS?
__________________
http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software. |
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