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Filtering by: Creator Knudsen, James G. Remove constraint Creator: Knudsen, James G. Advisor Fiez, Terri S. Remove constraint Advisor: Fiez, Terri S. Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • Ultra-low power receivers for wireless sensor networks

    Creator:
    Ayers, James S.
    Abstract:
    In wireless sensor network applications, low-power operation of the wireless receiver is critical. To address this need an ultra-low power Binary Frequency Shift Keying (BFSK) receiver using the super-regenerative architecture is developed. A prototype receiver is built and tested for operation in the 900 MHz ISM band. Lab measurements show...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF James S. Ayers for the degree

  • A comparison of substrate noise coupling in heavily doped and lightly doped substrates for mixed-signal circuits

    Creator:
    Ayers, James S.
    Abstract:
    An analysis of substrate noise coupling in mixed-signal circuits has been performed in the TSMC 0.25 [mu]m lightly doped and heavily doped CMOS processes. Methods to minimize noise coupling in both the chip design and board design phases are presented along with techniques for accurate circuit simulation of noise coupling....
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF James S. Ayers for the degree of

  • An ultra low power frequency reference for timekeeping applications

    Creator:
    Oporta, Hector Ivan
    Abstract:
    An ultra low power crystal oscillator that provides a frequency reference for battery powered timekeeping applications is presented. An amplitude control circuit is employed to ensure that minimum current is consumed. A subthreshold voltage regulator provides a supply voltage for the oscillator with minimum current consumption. The oscillator and regulator...
    Resource Type:
    Masters Thesis
    Full Text:
    . I want to express my appreciation to James Ayers, Thomas Brown, and Napong Panitantum for all of

  • Architectural Solutions for Analog Imperfections in ΔΣ Analog-to-Digital Based Systems

    Creator:
    Zali Asl, Samira
    Abstract:
    For today’s ubiquitous portable devices, innovative integrated circuits with high performance yet very low power are necessary. As these devices are used to communicate and sense real world signals in the environment, analog-to-digital converters (ADC) and systems are the key interface circuits needed to digitize the sensed information and they...
    Resource Type:
    Dissertation
    Full Text:
    discussion with Napong Panitantum, James Ayers and Omid Rajaee when being a clueless junior student. Nima

  • Noise and Blocker Cancellation Techniques for Power and Area Efficient Wireless Receivers

    Creator:
    Pourbagheri, Saeed
    Abstract:
    The design of mobile wireless devices has always focused on reducing power, area, and cost. This dissertation proposes two techniques that are leveraged to save power and area and therefore cost. The first techniques reduces the noise in the receiver and results in a relaxed power requirement. The second technique...
    Resource Type:
    Dissertation
    Full Text:
    Saurabh, Ankur, Justin, Samira, Mohsen, Hossein, Hamid, Brian, Rong Hua, Tom, James, Napong, Vikrant

  • Low power receivers for wireless sensor networks

    Creator:
    Ni, Ronghua
    Abstract:
    Wireless sensor networks are becoming important in several monitoring and sensing applications. Ultra low power consumption in the sensor nodes is important for extending the battery life of the nodes. In this dissertation, two low power BFSK receiver architectures are proposed and verified with prototype implementations in silicion. A 2.4...
    Resource Type:
    Dissertation
    Full Text:
    course works. In particular, I would like to thank Napong Panitantum, James Ayers, and Tomas Brown for

  • A nano-power wake-up circuit for RF energy harvesting wireless sensor networks

    Creator:
    Lindsley, Christopher J.
    Abstract:
    A fully integrated CMOS latched comparator is presented for use as a wake-up circuit that is attached to an RF energy harvester in a battery free wireless sensor network. The system consumes less than 36nA static current at 20°C and dissipates 2pJ of energy per conversion. The comparator comprises of...
    Resource Type:
    Masters Thesis
    Full Text:
    an undergraduate. Robert Batten, James Ayers, Thomas Brown, Napong Panitantum, Triet Le, Skyler

  • A methodology for efficient substrate noise estimation from large scale digital circuits in mixed signal SoC's

    Creator:
    Held, Martin A.
    Abstract:
    A methodology for rapid estimation of substrate noise generated by digital circuitry in mixed-signal circuits is presented. This methodology is incorporated into the Silencer! framework, and also provides for future improvements including pre-layout noise estimation. Measurements of a test chip fabricated in the TSMC o.25[mu]m heavily doped logic process validate...
    Resource Type:
    Masters Thesis
    Full Text:
    there is a speedup of over 80 times with one-tenth the memory use is obtained with only a G percent

  • A comparison of substrate noise coupling in lightly and heavily doped CMOS processes for 2.4 GHz LNA's

    Creator:
    Hazenboom, Duncan S.
    Abstract:
    Three types of low noise amplifiers operating at 2.4GHz were designed. They are the commonly used single-ended and differential amplifiers as well as a new quasi-differential amplifier. The substrate noise injected into these amplifiers is examined for both heavily and lightly doped CMOS substrates. For the single-ended amplifier the noise...
    Resource Type:
    Masters Thesis
    Full Text:
    circuits, Hui En Pham for assisting with the initial EPIC simulations, and James Ayers for suggesting a

  • Comparison and impact of substrate noise due to clocked and clockless circuitry

    Creator:
    Le, Jim K.
    Abstract:
    Delay insensitive asynchronous circuitry provides significant advantages with respect to substrate noise due to localized switching. The differences between the substrate noise from NULL Convention Logic (NCL) and traditional Clocked Boolean Logic (CBL) are described and analyzed based on measured results. A test chip fabricated in the TSMC 0.25 um...
    Resource Type:
    Masters Thesis
    Full Text:
    the lab, Husni Habal for his work on the PRNG, James Ayers for the chip-on-board packaging, Martin