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Filtering by: Creator Mahmoud, Hosam M. Remove constraint Creator: Mahmoud, Hosam M. Committee Member Natarajan, Arun Remove constraint Committee Member: Natarajan, Arun

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  • Power Efficient Architectures for High Accuracy Analog-to-Digital Converters

    Creator:
    Zhang, Yi
    Abstract:
    Incremental ADCs (IADCs) have found wide applications in sensor interface circuitry since, compared to ∆Σ ADCs, they provide low-latency high-accuracy conversion and easy multiplexing among multiple channels. On the other hand, continuous-time ∆Σ ADCs (CTDSM) have been receiving more and more attention as a power-efficient solution in targeting medium to...
    Resource Type:
    Dissertation
    Full Text:
    than 29 compared to the IADC1. Fabricated in 0.18-μm CMOS process, the prototype ADC occupies 0.5 mm2

  • Power Efficient Architectures for Low Noise Switched-Capacitor Filters and High Accuracy Analog-to-Digital Converters

    Creator:
    Payandehnia, Pedram
    Abstract:
    Filters and data converters are key analog-and-mixed-signal (AMS) building blocks in communication systems, such as software-defined radios and internet-of-things. In this dissertation, novel switched-capacitor filter and analog-to-digital converter (ADC) circuit configurations have been explored which are power efficient and are digital scaling friendly. First, a novel switched-capacitor low-pass filter architecture...
    Resource Type:
    Dissertation
    Full Text:
    Azizi, Yi Zhang, Chia-Hung Chen, Tao Hi, Xin Meng, Manju- nath Kareppagoudr, Lukang Shi, Mahmoud

  • Characteriscts of FSO Channel in WIFO

    Creator:
    Wang, songtao
    Abstract:
    With explosive growth of Internet access from smart phones and tablets, increasing bandwidth for WIFI system is badly needed. Depending on two years’ research, we produced a novel communication system called WIFO system, which integrates both RF (Radio Frequency) and FSO (Free Space Optical) techniques. WIFO system can significantly increase...
    Resource Type:
    Capstone Project
    Full Text:
    15 0 5 10 15 20 25 30 35 m W LED 1 LED 2 Figure 4.2: Power measurement of two LEDs emitting

  • Dynamic Error Calibration for Continuous-Time Delta-Sigma Modulator with Multi-GHz Sampling Rate

    Creator:
    He, Tao
    Abstract:
    Continuous-time ΔΣ modulators are widely used in cellular handsets due to their power efficiency and inherent anti-aliasing characteristics. To achieve demanding cellular bandwidth requirements while maintaining good power efficiency, multi-bit feedback is typically used. This approach provides benefits such as lower OSR, relaxed loop filter requirements, and reduced jitter sensitivity....
    Resource Type:
    Dissertation
    Full Text:
    talented and hard- working colleagues Manjunath Kareppagoudr, Yanchao Wang, Mahmoud Sadollahi, Jyotindra

  • Design Techniques for Wide-bandwidth Continuous-time Delta-sigma Modulators with Noise-shaping Quantizers

    Creator:
    Dey, Siladitya
    Abstract:
    Noise-shaping multibit quantizers in a ΔΣ modulator offer extra orders of noise shaping without increasing the loop-filter order and without compromising the stability of the modulator. This dissertation presents two new architectures for improving the overall performance of continuous-time ΔΣ modulators using noise-shaped quantizers. The first modulator architecture is motivated...
    Resource Type:
    Dissertation
    Full Text:
    Bhagirath, Ajmal V Kayyil, Kamala R Sadagopan, Mahmoud Sadollahi, Manoj Johnson and many others. It was

  • Analysis and Design of Low Voltage LC Oscillators and their Application to Wireless Sensor Networks

    Creator:
    Guha Roy, Ankur
    Abstract:
    This dissertation focuses on the analysis, design, and application of inductor-capacitor (LC) oscillators for wireless sensor networks (WSNs). First an analysis and design optimization approach for enhanced swing, low power CMOS LC oscillators is presented. A phasor based analysis is used for determining the amplitude and phase noise of these...
    Resource Type:
    Dissertation
    Full Text:
    ) nAsin(ωt) -nAcos(ωt) VG+mnAcos(ωt) +(1-m)nAsin(ωt) VD M1 (a) (b) C1 =Ce/(1-n) C2 =Ce/n L1 Rp