TAS6424E-Q1: The THD+N or THD algorithm

Hsinhung KUO

Prodigy 20 points

Part Number: TAS6424E-Q1
Other Parts Discussed in Thread: TAS6424

Hi TI Team

May I ask how to calculate the TAS6424 or TAS6584 for the THD+N or THD algorithm?

6 months ago

0 Gregg Scott 6 months ago

TI__Mastermind 35965 points

Hsinhung,

THD is not calculated but measured with audio test equipment.

Regards,
Gregg Scott

0 Hsinhung KUO 6 months ago in reply to Gregg Scott

Prodigy 20 points

Hi Gregg

Below is our structure, We design this for measured the total power from AMP and want to know the total hormonic value(R-load is 4Ω), I'ii provide THD algorithm to our SW team, So I need to know how to calculated it, could you have any suggestion?

0 Gregg Scott 6 months ago in reply to Hsinhung KUO

TI__Mastermind 35965 points

Hsinhung,

This request is outside the use of our amplifiers, because we measure the THD with calibrated test equipment.

I performed a quick search and found that Matlab has a function to calculate the THD. I see there is a thd() function inside the signal processing library. If you do not have access to Matlab, I suggest you perform more searches online to see how to do it in the digital domain.

Regards,
Gregg Scott

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TAS6424E-Q1: The THD+N or THD algorithm