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Chip Amps Amplifiers based on integrated circuits

Oscillation in LM4950 Design
Oscillation in LM4950 Design
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Old 16th August 2004, 01:53 AM   #1
rswilson is offline rswilson  Canada
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Question Oscillation in LM4950 Design

Hi, am working on a design based on National's LM4950 in bridged mode. What seems to work perfectly on the breadboard oscillates wildly on my pcb design. The oscillation is between 1 and 2 Mhz and anywhere from 0.4 to 1V peak to peak. It seems I'm doing something seriously wrong with the layout, but tried to follow the reference design as much as possible.

If anyone has suggestions on how to debug or has used the 4950 successfully the feedback would be greatly appreciated! Thanks,

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