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Factors that can cause charge/discharge rates of capacitor to be different

Jodles

Nov 19, 2010
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Nov 19, 2010
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Is there any good reason as to why the charge and discharge rates of a capacitor may be different? I'm trying to reason why, but I don't see why (in an ac circuit) one direction should be any different than the other...
 

Laplace

Apr 4, 2010
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Apr 4, 2010
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Electrolytic capacitors are based on a chemical reaction which may not have exactly the same rate in the forward and reverse directions. Also, electrolytics have noticeable internal leakage. Film and ceramic capacitors exhibit dielectric absorbtion or soakage which is fairly linear for both charge and discharge but can sometimes cause unexpected results.
 

Jodles

Nov 19, 2010
13
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Nov 19, 2010
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Thank you very much, Laplace! I wouldn't have thought of that...
 
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