Tas5731m 0x51 & 0x52 post levels

eden de vismes

Other Parts Discussed in Thread: TAS5731M

Hi,

Is there any way to invert phase signal with 0x51 or 0x52 levels? (I see default is 0x00800000, maybe something like the complement?)

many thanks

Eden

over 9 years ago

0 Diego Melendez over 9 years ago

TI__Guru 57800 points

Hi, Eden,

Pre and post scale of the TAS5731M can be controlled via registers 0x57 and 0x56. The values for these registers are 26-bit coefficients using a 3.23 and 9.17 number format format respectively. You can find more information about how to calculate the coefficients on page 40 of the TAS5731M datasheet.

The phase can't be inverted with pre or post controls, but you can use one of the biquads available for each channel as a phase shift filter.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 eden de vismes over 9 years ago in reply to Diego Melendez

Prodigy 50 points

Thanks for your fast answer, do you have any document to help me implement a phase shifter with a biquad cell?

Kind regards,

Eden

0 Diego Melendez over 9 years ago in reply to eden de vismes

TI__Guru 57800 points

Hi, Eden,

This is quite simple with our TAS5731M GUI. You just need to open the Filter calculation tool by double clicking any biquad, then you just need to select the phase shift filter from the Filter type column.

The GUI can be downloaded from the TAS5731M EVM product folder on ti.com.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 eden de vismes over 9 years ago in reply to Diego Melendez

Prodigy 50 points

Many thanks Diego! (I had never used the GUI, just calculated biquad values by myself !)

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Tas5731m 0x51 & 0x52 post levels