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CCS/UCD3138PFCEVM-026: About the way of reducing THD

Part Number: UCD3138PFCEVM-026

Tool/software: Code Composer Studio

after reading SLUA709,

We have  known  two ways of reducing THD.

one is 8Xsampling and add current offset, the other is ZVS and ZCS

tow methods above need working together ?

or only one could working at the same time?

HOPE FOE YOUR ADVICE, THANKS.