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A Power Efficient Polyphase Sharpened CIC Decimation Filter for Sigma-Delta ADCs

Karnati, Nikhil Reddy

Abstract Details

2011, Master of Science in Engineering, University of Akron, Electrical Engineering.
The current thesis presents the design and implementation of a power-efficient poly-phase decimation filter for Sigma-delta ADCs. A cascade of Cascaded-Integrator Comb (CIC) filter and Sharpened Cascaded-Integrator Comb (SCIC) filter is used as the decimation filter. This thesis further develops the idea of the two stage architecture by careful consideration of all the possibilities of implementing the two stage structure so as to achieve desired frequency characteristics with minimum power consumption. The architecture of the SCIC stage is slightly modified such that poly-phase decomposition can be easily applied. Therefore, both the CIC and SCIC stages are implemented in poly-phase form, which enables additional power consumption reduction. Various architectures for the poly-phase decomposition of the CIC and SCIC cascaded filter are considered and the architecture that consumes minimum power is chosen. The proposed architecture consumes a power of 1.05 mW and occupies an area of 0.11 mm2 using CMOS 1µm technology. The proposed design shows the lowest power consumption among similar filter architecture with equivalent performance.
Kye-Shin Lee, Dr. (Advisor)
Joan Carletta, Dr. (Committee Member)
Robert Veillette, Dr. (Committee Member)
85 p.

Recommended Citations

Citations

  • Karnati, N. R. (2011). A Power Efficient Polyphase Sharpened CIC Decimation Filter for Sigma-Delta ADCs [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1318130811

    APA Style (7th edition)

  • Karnati, Nikhil Reddy. A Power Efficient Polyphase Sharpened CIC Decimation Filter for Sigma-Delta ADCs. 2011. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1318130811.

    MLA Style (8th edition)

  • Karnati, Nikhil Reddy. "A Power Efficient Polyphase Sharpened CIC Decimation Filter for Sigma-Delta ADCs." Master's thesis, University of Akron, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1318130811

    Chicago Manual of Style (17th edition)