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Yes, this is current-driven and/or generated.
this TEA IC are "class D" output (chopped), so a interference here is nrmal. But, if parabola is larger and image is ok, is nothing to worry (for example). Assuming image are distorted, something in the current path are wrong (good to re-check the TEA datasheet). For trying to reduce the parabola amplitude or gain.
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So many projects, so little time...
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