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  • Experimental verification of a mismatch-shaping DAC

    Creator:
    Hudson, William Forrest, 1971-
    Abstract:
    Delta-sigma data converters have gained popularity in both analog-to-digital and digital-to-analog converters (ADCs and DACs) due to their simplicity, high linearity and immunity to many analog circuit imperfections. These data converters include features such as oversampling, noise-shaping, and (historically) single-bit quantization. Single-bit converters are preferred for their inherent linearity. This...
    Resource Type:
    Masters Thesis
    Full Text:
    equipment. 40 4.8 Output spectrum with fs = 500 kHz, 0th order ESL. 41 4.9 Output spectrum with fs = 500

  • A dual-frequency diode laser displacement sensor

    Creator:
    Hwang, Nam
    Resource Type:
    Masters Thesis
    Full Text:
    oscilloscope traces ( fs = 100.00 MHz, fLO = 100.01 MHz, and dz = 37.5 cm ). Fig. 3-8 (b) Monitored

  • Low noise FSCL digital circuits for decimation filter

    Creator:
    Wong, Man Wa
    Abstract:
    A new circuit technique called Folded Source Coupled Logic (FSCL) has been developed to implement the digital section of mixed-signal IC applications. This FSCL circuit technique offers the advantage of low overlap current spikes during the switching transitions of conventional CMOS gates. This overlap current spike has become one of...
    Resource Type:
    Masters Thesis
    Full Text:
    modu- lation, noise can be filtered out by the low-pass decimation filter. Input X(t) HIntegrator fs

  • Resolution enhancement of analog-to-digital converters through computationally simple digital filtering

    Creator:
    Zahl, Eric L.
    Abstract:
    The resolution of analog-to-digital converters can be distinguished as absolute resolution, or average resolution. This study reviews average resolution enhancement techniques and proposes a method which is particularly applicable as a low-cost modification to a high-speed waveform acquisition system. This method uses oversampling combined with computationally simple digital filtering to...
    Resource Type:
    Masters Thesis
    Full Text:
    predictor filter in the feedback path. x(t) x(t) B-bit A/D A B-bit -0 D/A N fs P(z) Predictor B

  • Sensitivity analysis and architectural comparison of narrow-band sharp-transition digital filters

    Creator:
    Kulkarni, Satish S.
    Abstract:
    Due to advances in high-density low-cost VLSI and communication technology, digital filtering and signal processing are being widely used for real-time signal processing applications. Given the filter specification, choosing the best filter structure for a given application is not a trivial task. The choice of a particular filter structure depends...
    Resource Type:
    Masters Thesis

  • Weather influence on Loran-C

    Creator:
    Graulich, Markus Günter
    Abstract:
    The influence of weather on the long range radio navigation system Loran-C was investigated. The variables analyzed over a period of 255 days were: time differences (TDs), TD signal-to-noise ratios, TD standard deviations (measured at a fixed receiver location in Corvallis, Oregon), time interval numbers (TINOs) (measured at the transmitter...
    Resource Type:
    Masters Thesis
    Full Text:
    Appendix for RWY and RXY). 340 320 - 300 - 2e0 - 260 - 240 220 - 200 - ISO - IGO - 140 - 120 - 1D0

  • Two dimensional numerical simulation of a non-isothermal GaAs MESFET

    Creator:
    Lin, Angela A.
    Abstract:
    The low thermal conductivity of gallium arsenide compared to silicon results in self-heating effects in GaAs MESFETs that limit the electrical performance of such devices for high power applications. To date, analytical thermal models of self heating in GaAs MESFETs are based on the assumption of a uniformly heated channel....
    Resource Type:
    Masters Thesis
    Full Text:
    critical electric field, Fs, the velocity is proportional to the field. Saturation velocity, vs, is

  • Advanced image segmentation and data clustering concepts applied to digital image sequences featuring the response of biological materials to toxic agents

    Creator:
    Roussel, Nicolas
    Abstract:
    Image segmentation is the process by which an image is divided into number of regions. The regions are to be homogeneous with respect to some property. Definition of homogeneity depends mainly on the expected patterns of the objects of interest. The algorithms designed to perform these tasks can be divided...
    Resource Type:
    Masters Thesis

  • Three dimensional Monte Carlo simulator with parallel multigrid poisson solver

    Creator:
    Sandalci, Can K.
    Abstract:
    We present the results of embedding a multigrid solver for Poisson's equation into the parallel 3D Monte Carlo device simulator, PMC-3D. First we compare the sequential multigrid implementation to the sequential Successive Overrelaxation (SOR) Monte Carlo code used previously in PMC-3D. Depending on the convergence threshold, we obtain significant speedups...
    Resource Type:
    Masters Thesis
    Full Text:
    rates corresponding to different scattering mechanisms, as F = E Fi(v(t)) + Fs(v(t)). The

  • A photodetecting device that rejects ambient light

    Creator:
    Li, Ning
    Abstract:
    The integration of photodetectors with IC circuits provides a significant improvement over conventional designs. Featuring noise reduction, extended frequency responses, lower power consumption, and data operations, these integrated devices open challenging opportunities for many applications. One type of photodetector has the potential for important applications in the life science and...
    Resource Type:
    Masters Thesis
    Full Text:
    monitored by a Tektronix TDS-320 digital oscilloscope. A function generator drove the LED at a frequency