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  • Time domain characterization of interconnect discontinuities

    Creator:
    Jong, Jyh-Ming
    Abstract:
    The purpose of this study is to develop experimental techniques to characterize typical interconnect discontinuities, including bends, steps, T junctions, vias and pads, which are the most commonly encountered interconnections in high speed digital integrated circuits, hybrid and monolithic microwave circuits and electronic packages. The time domain reflection response of...
    Resource Type:
    Masters Thesis
    Full Text:
    53 Fs reflection coefficient at input port 104 Fo reflection coefficient due to impedance mismatch

  • Lowpass and bandpass current-mode delta-sigma DACs employing mismatch-shaping

    Creator:
    Shui, Tao, 1969-
    Abstract:
    Delta-sigma modulators are currently a very popular technique for making high-resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). These oversampled data converters have several advantages over conventional Nyquist-rate converters, including an insensitivity to many analog component imperfections, a simpler antialiasing filter and reduced accuracy requirements in the sample and hold....
    Resource Type:
    Dissertation
    Full Text:
    69 4.3 Summary 74 Chapter 5. Design of the second current-mode DAC (UEDAC2) 75 5.1 Block Diagram

  • Comparison of DPCM and Subband Codec performance in the presence of burst errors

    Creator:
    Bhutani, Meeta
    Abstract:
    This thesis is a preliminary study of the relative performance of the major speech compression techniques, Differential Pulse Code Modulation (DPCM) and Subband Coding (SBC) in the presence of transmission distortion. The combined effect of the channel distortions and the channel codec including error correction is represented by bursts of...
    Resource Type:
    Masters Thesis
    Full Text:
    speech signal confined to B = 4000 Hz sampled at the Nyquist rate of 8000 samples per second; i.e. Fs

  • Novel switched-capacitor circuits for delta-sigma modulators

    Creator:
    Yesilyurt, Ayse Gul
    Abstract:
    Oversampled delta-sigma modulation is one of the widely used A/D conversion techniques for narrow bandwidth signals. In this study several new lowpass and bandpass delta-sigma modulator architectures as well as novel pseudo-N-path integrators that can be used in implementing these architectures are proposed. By using multiplexing techniques the new lowpass...
    Resource Type:
    Dissertation
    Full Text:
    -sigma modulator) 69 5.7. Power spectra obtained from 2-stage multi-bit cascaded modulators with z

  • Oversampling digital-to-analog converters

    Creator:
    Shu, Shaofeng
    Abstract:
    Oversampling and noise-shaping methods for digital-to-analog (D/A) conversion have been widely accepted as methods of choice in high performance data conversion applications. In this thesis, the fundamentals of D/A conversion and oversampling D/A conversion were discussed, along with the detailed analysis and comparison of the reported state-of-the-art oversampling D/A converters....
    Resource Type:
    Dissertation
    Full Text:
    69 system 5.4 The maximum amplitude of the 1-bit quantization error as a function of the amplitude

  • Digital clocks based upon dual side band suppressed carrier modulation

    Creator:
    Arnett, David W.
    Abstract:
    A method and apparatus are presented for generating suppressed carrier digital clock signals. These clock signals have the advantage of being broad band in nature and thus exhibiting lower power spectral density. Structures or systems utilizing such clock signals would be less likely to create electromagnetic noise of sufficient intensity...
    Resource Type:
    Masters Thesis
    Full Text:
    #1 Modulation Profile. 69 7.2 Amplitude Reductions Measured on the Modulated Clock Signal due to

  • Delta-sigma modulators employing continuous-time circuits and mismatch-shaped DACs

    Creator:
    Zhang, Bo
    Abstract:
    Delta-sigma modulators are currently a very popular technique for making high-resolution analog-to-digital and digital-to-analog converters. These oversampled data converters have several advantages over conventional Nyquist-rate converters, including an insensitivity to many analog component imperfections, a simpler antialiasing filter and reduced accuracy requirements in the sample and hold. Though the initial...
    Resource Type:
    Dissertation
    Full Text:
    . Nyquist's sampling theorem states that the minimum sampling frequency fs, min should be at least two times

  • Multi-bit delta-sigma switched-capacitor DACs employing element-mismatch-shaping

    Creator:
    Lin, Haiqing
    Abstract:
    Delta-sigma modulators are currently a very popular technique for making high-resolution analog-to-digital and digital-to-analog converters (ADCs and DACs). Most delta-sigma modulators in production today employ single-bit quantization because a 1-bit DAC is inherently linear, whereas a multi-bit DAC is not. Were it not for this drawback, the use of multi-bit...
    Resource Type:
    Dissertation
    Full Text:
    . 69 5.6 System diagram of the clock generator. 72 5.7 Clock-divider & phase-shifter. 73 5.8 A cell

  • Design of switched-current circuits for a bandpass delta-sigma modulator

    Creator:
    Manapragada, Praveen
    Resource Type:
    Masters Thesis
    Full Text:
    : Frequency response of the resonator. 69 Figure 5.8: Response of the resonator to an input sinusoidal signal

  • Optimizing the microcode produced by a high level microprogramming language

    Creator:
    Ma, Perng-Yi
    Abstract:
    The purpose of this research is to develop methods to translate a certain machine independent intermediate language (IML) to efficient horizontal microprograms for a class of microprogrammable machines. This IML has been developed by Malik (12) and is compiled directly from a high level microprogramming language used to implement a...
    Resource Type:
    Dissertation
    Full Text:
    Field Description Model FS final state of a SLC GPR general purpose registers of the host machine