THE IMAGE-REJECT CONTINUOUS-TIME QUADRATURE BANDPASS SIGMA-DELTA MODULATOR |
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| Nejmeddine Jouida, Chiheb Rebai, Adel Ghazel, Dominique Dallet |
- Abstract:
- This paper presents the design of an image-reject continuous-time (CT) quadrature bandpass (QBP) %Delta;%Sigma; modulator using a tailored signal-transfer-function (STF) design. The quadrature delta-sigma noise shaping with polyphase filter implementations and strategic IF placement effectively improve image rejection internally. The Fifth-order CT QBP %Delta;%Sigma; modulator planned for WiMAX and Bluetooth standards, illustrates clearly the totally elimination of image generation and the correctly signal process. This led to remove the baseband filter and PGA at the price of a very challenging ADC with merged-in cited functionalities. So, less analog components, low power consumption and high performance for the low-IF receiver.
- Download:
- IMEKO-IWADC-2008-172.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- IWADC 2008
- Title:
13th IMEKO TC4 Workshop on ADC Modelling and Testing IWADC (together with XVIth IMEKO TC4 International Symposium on Electrical Measurements and Instrumentation) (IWADC)
- Place:
- Florence, ITALY
- Time:
- 22 September 2008 - 24 September 2008