1 / 20

ECE 191 Fall 2003 Performance Enhancement of Analog to Digital converter through Dithering Dr. Pankaj Das Dr Charles T

Our Goals. Validate an various analytical dithering model in linear and nonlinear, narrow-band and wide-band systems to meet a wide range of applications. Guideline (Provided by Sponsor for week 2). Model a basic schematic that shows the problem associates with ADC. Circuit Schematic (ADC/D

yoland
Download Presentation

ECE 191 Fall 2003 Performance Enhancement of Analog to Digital converter through Dithering Dr. Pankaj Das Dr Charles T

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. ECE 191 Fall 2003 Performance Enhancement of Analog to Digital converter through Dithering Dr. Pankaj Das Dr Charles Tu Sponsor: Titan Corp. Scott Marks RF Engineering Manager Group members Chen-Hua Yang Cheng-Han Wang Hung William Chan Chi-man Cho Szu-Chun Tsao

    2. Our Goals Validate an various analytical dithering model in linear and nonlinear, narrow-band and wide-band systems to meet a wide range of applications

    3. Guideline (Provided by Sponsor for week 2) Model a basic schematic that shows the problem associates with ADC

    4. Circuit Schematic (ADC/DAC)

    5. Ideal ADC Transfer function

    6. Ideal Performance

    7. Realistic ADC Transfer function

    8. Non-Ideal Performance

    9. Distorted Sin Wave

    10. Dither Subtractive Dither Dither signal is subtractive from the output to increase SNR Non-subtractive Dither Dither signal is not subtractive from the output Out-of-Band

    11. Subtractive Dither

    12. Non-Subtractive Dither

    13. Why NSD? Dither signal must be available at each end of the channel Impractical for application Simpler and cheaper for this project (Sponsor said so)

    14. Type of Dither signal Rectangular Triangular Gaussian (Our choice!)

More Related