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  • A tunable duty-cycle-controlled switched-R-MOSFET-C CMOS filter for low-voltage and high-linearity applications

    Creator:
    Xiao, Ying
    Abstract:
    A novel switched-R-MOSFET-C input branch is proposed for low-voltage and high-linearity applications. The tunability is achieved by varying the clock duty cycle using an automatic tuning circuit. This tuning method does not involve a change in gate voltage, and is therefore particularly suitable for low-voltage applications. The advantages of the...
    Resource Type:
    Masters Thesis
    Full Text:
    , 2004 . Title: A Tunable Duty-Cycle-Controlled Switched-R-MOSFET-C CMOS Filter for Low-Voltage and

  • Investigation of a noise-shaping accelerometer interface circuit for two-chip implementation

    Creator:
    Zechmann, Jacob W.
    Abstract:
    The world market for sensors is several hundred million dollars growing at an annual rate of 20 percent with accelerometers comprising 19 percent of the market. With an increasing market, a wide range of applications with varying degrees of resolution are in demand. Therefore, there is sufficient motivation for developing...
    Resource Type:
    Masters Thesis
    Full Text:
    Redacted for privacy AN ABSTRACT OF THE THESIS OF Jacob W

  • Power-efficient two-step pipelined analog-to-digital conversion

    Creator:
    Lee, Ho-Young
    Abstract:
    Hand-held devices are among the most successful consumer electronics in modern society. Behind these successful devices, lies a key analog design technique that involves high-performance analog-to-digital conversion combined with very low power consumption. This dissertation presents two different approaches to achieving high power efficiency from a two-step pipelined architecture, which...
    Resource Type:
    Dissertation
    Full Text:
    analog-to-digital converter is reconfigured digitally using a single comparator and an R-2R digital-to

  • Limitations and optimization of a blind calibration algorithm for nonlinearity in analog to digital converters

    Creator:
    Coker, Brandilyn
    Abstract:
    Analog to digital converters (ADCs) are a critical part of communication between the physical world and the increasingly digital systems humans use every day. ADCs have inherent non-idealities that degrade performance. Nonlinearity is one of the most prevalent non-idealities that designers face. While calibration methods for nonlinearity exist in the...
    Resource Type:
    Masters Thesis
    Full Text:
    communication between the physical world and the increasingly digital systems humans use every day. ADCs have

  • Area efficient D/A converters for accurate DC operation

    Creator:
    Greenley, Brandon Royce
    Abstract:
    The design of mixed-signal integrated circuits has evolved from simple analog and digital circuits operating on the same silicon substrate to the point that now we have complete system on a chip solutions for communication systems. The levels of integration needed to remain cost effective in today's integrated circuit (IC)...
    Resource Type:
    Masters Thesis
    Full Text:
    (W/L)4. It can be seen that: 11141\ ] r/47\ 1 11J47\ 1 r/T47\ i)M2=fti) +Ei+l(-) +c21+1L) +f3I

  • An efficient switched capacitor buck-boost voltage regulator using delta-sigma control loop

    Creator:
    Rao, Arun
    Abstract:
    Voltage converters or charge pumps find their use in many circuits. They are extensively used in hand held devices as cell phones, pagers, PDA's and laptops. Some of the important issues relating to design of voltage regulators for handheld devices are size, efficiency and noise. Another important factor to be...
    Resource Type:
    Masters Thesis
    Full Text:
    4 lpA I=4 I=4i m=4 m=4 20k w=121I 1Iw=12H 1w=12 I I I=4t ii I=4t m=1 r+1 I-+im=1 m=6 Figure

  • Low voltage techniques for pipelined analog-to-digital converters

    Creator:
    Carnes, Joshua Kenneth
    Abstract:
    To realize pipelined ADCs in deep-submicron processes, low voltage techniques must be developed to work around problems created by limited supply voltages such as the floating switch dead zone, reduced SNR, and reduced OpAmp performance. This thesis analyzes standard and low voltage design issues for pipelined ADCs and proposes a...
    Resource Type:
    Masters Thesis
    Full Text:
    5.1 Fully Differential ORST………………………………………… 40 5.2 Front-End T/R Network with Increased Input Range

  • A multi-bit hybrid DSM over full-scale range without feedback DEM

    Creator:
    Kwon, Sunwoo, 1974-
    Abstract:
    Evolution of the mobile communication standards and proliferation of hand-held devices mandate stringent Analog-to-Digital Converter (ADC) specifications. Among various ADCs, a ∆Σ ADC is best known as a power-efficient ADC when more than 12b is required. However, a conventional discrete-time (DT) ∆Σ Modulator (∆ΣM) is inadequate for low-power wideband applications...
    Resource Type:
    Dissertation
    Full Text:
    Bandwidth [MHz] P o w e r c o n s u m p ti o n [ m W ] Nyquist-rate ADC Delta-Sigma modulator Figure

  • Low voltage switched capacitor circuits for lowpass and bandpass [delta sigma] converters

    Creator:
    Keskin, Mustafa
    Abstract:
    The most accurate method for performing analog signal processing in MOS (metal-oxide-semiconductor) integrated circuits is through the use of switched-capacitor circuits. A switched-capacitor circuit operates as a discrete-time signal processor. These circuits have been used in a variety of applications, such as filters, gain stages, voltage-controlled oscillators, and modulators. A...
    Resource Type:
    Dissertation
    Full Text:
    [_ 4cos(w) + cos(2w)]dw (2.10) 2a2i3qr r 1 271 7r4a4sin() + sin(--)] 5R5 (2.11) The signal-to-noise

  • High-speed CMOS dual-modulus presalers for frequency synthesis

    Creator:
    Desikachari, Ranganathan
    Abstract:
    Phase-locked loop (PLL) frequency synthesizers lie at the heart of most radio transceivers. An important objective of the electronics and communications industry is to design high-speed building blocks which dissipate the lowest possible power, and to ac- complish this with the cheapest technology. The dual-modulus prescaler is one of the...
    Resource Type:
    Masters Thesis
    Full Text:
    . The reference divider ÷R can be used to scale highly accurate crystal based input frequencies down to