prescalar – postscalar open-loop and closed-loop settings
DESCRIPTION
Prescalar – Postscalar Open-loop and Closed-loop Settings. WHY PRES-SCALAR – POST-SCALAR. What is it? Pre-scalar has digital headroom of +24dB without clipping Post-scalar can be adjusted to the desire distortion for increased power over the full scale input. What is it for? - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Prescalar – Postscalar Open-loop and Closed-loop Settings](https://reader036.vdocument.in/reader036/viewer/2022082612/56813feb550346895daae90a/html5/thumbnails/1.jpg)
TI Information – Selective Disclosure
Prescalar – PostscalarOpen-loop and Closed-loop
Settings
![Page 2: Prescalar – Postscalar Open-loop and Closed-loop Settings](https://reader036.vdocument.in/reader036/viewer/2022082612/56813feb550346895daae90a/html5/thumbnails/2.jpg)
TI Information – Selective Disclosure
WHY PRES-SCALAR – POST-SCALAR
• What is it?– Pre-scalar has digital headroom of +24dB without clipping– Post-scalar can be adjusted to the desire distortion for
increased power over the full scale input.
• What is it for?– By increasing the input signal over the full scale (clipped
signal) in the pre-scalar block and then adjusting the output the desired distortion in the post-scalar block:
• The distortion level is independent of PVCC• The distortion level is also maintained in post-scalar block, i.e. in a
certain range the post-scalar block can be adjusted so that the output amplitude changes but the distortion level stays constant
![Page 3: Prescalar – Postscalar Open-loop and Closed-loop Settings](https://reader036.vdocument.in/reader036/viewer/2022082612/56813feb550346895daae90a/html5/thumbnails/3.jpg)
TI Information – Selective Disclosure
Closed-loop TAS5710
Prescalar: 0x57 00AB AAAAPostscalar: 0x56 0002 3333Input: 13 VDC, full scale digitalLoad: 8 OhmOutput: 8W, 10% THD+N
1kHz – 8W – 10% THD+N 15kHz – 8W – 10% THD+N
![Page 4: Prescalar – Postscalar Open-loop and Closed-loop Settings](https://reader036.vdocument.in/reader036/viewer/2022082612/56813feb550346895daae90a/html5/thumbnails/4.jpg)
TI Information – Selective Disclosure
Open-loop TAS5709
Prescalar: 0x57 002B 0000Postscalar: 0x56 0006 B000Input: 13 VDC, full scale digitalLoad: 8 OhmOutput: 8W, 10% THD+N
1kHz – 8W – 10% THD+N 15kHz – 8W – 10% THD+N
![Page 5: Prescalar – Postscalar Open-loop and Closed-loop Settings](https://reader036.vdocument.in/reader036/viewer/2022082612/56813feb550346895daae90a/html5/thumbnails/5.jpg)
TI Information – Selective Disclosure