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TAS5558: phase shift

Jeff YANG
Genius 4610 points
Part Number: TAS5558

Hi,

I want control bandwidth 1 phase shift 0~180degree @ 100Hz, how to adjust it? thanks!

Jeff

  • 0
    TI__Mastermind 31780 points

    Hi Jeff

         The BQ inside of our device are all IIR filters, it can't control phase shift precisely. I can show you some simulation results about different Bandwidth settings:

    Bandwidth 5KHz:

    Bandwidth 1KHz:

    Bandwidth 100Hz:

    Bandwidth 10Hz:

    Bandwidth 1Hz (zoom in to observe):

    You can take these results as the reference. If you want to realize very little phase shift, you can set the Bandwidth smaller than 10Hz. If you want to realize 180 degree shift, you need to set the Bandwidth around 1000Hz. Larger Bandwidth will affect more frequency area and always have a side effect of phase drop before the frequency point.