zero-time oscillation

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can anybody help me with this topic?

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It depend on what you want. If you want to keep the old ausgangX value, place your case block inside the clock loop, like Daixiwen said.

If you just want to add another ausgangX to resultreal, without a memory function, you have to replace:

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WHEN 0 => ausgang0 <= ausgang0 + resultreal;ausgang <= ausgang0;

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with

WHEN 0 => ausgang <= ausgang0 + resultreal;

for every line.

Regards, Ton