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Filtering by: Creator Wang, Chee Tao Remove constraint Creator: Wang, Chee Tao Subject Modulators (Electronics) Remove constraint Subject: Modulators (Electronics)

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  • Low-power high-resolution delta-sigma ADC design techniques

    Creator:
    Wang, Tao
    Abstract:
    This dissertation presents a low-power high-resolution delta-sigma ADC. Two new architectural design techniques are proposed to reduce the power dissipation of the ADC. Compared to the conventional active adder, the direct charge transfer (DCT) adder greatly saves power by keeping the feedback factor of the active adder unity. However, the...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE THESIS OF Tao Wang for the degree of Doctor of Philosophy in Electrical and

  • 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:
    , and Bo Wang, Tao Sun, MM Shen and Fenardi Thenus for their unselfish help in all aspects of life and

  • Design techniques for wideband low-power Delta-Sigma analog-to-digital converters

    Creator:
    Wang, Yan
    Abstract:
    Delta-Sigma (ΔΣ) analog-to-digital converters (ADCs) are traditionally used in high quality audio systems, instrumentation and measurement (I&M) and biomedical devices. With the continued downscaling of CMOS technology, they are becoming popular in wideband applications such as wireless and wired communication systems,high-definition television and radar systems. There are two general realizations...
    Resource Type:
    Dissertation
    Full Text:
    , Rishi Gupta, Qadeer Khan, Ming-Hung Kuo, Tao Wang, Jiaming Lin, Jinzhou Cao, Ramin Zanbaghi, Chia-Hung

  • Wideband and high accuracy delta sigma modulation data converter

    Creator:
    Jung, Youngho
    Abstract:
    Nowadays, needs for wideband and high accuracy analog-to-digital converter are increasing rapidly in manifold applications such as wireless communication, digital video and other consumer electronics. Besides, low power consumption is required to have longer battery life in portable systems. CMOS technology scaling and innovative modulator topology make the implementation much...
    Resource Type:
    Dissertation
    Full Text:
    Yu, Yan Wang, Weilun Shen, Tong Tao, Wang Tao, Wei Li, Po-Yao Ke, Jiaming Lin, Chia-Hung Chen

  • Novel structures for high-speed delta-sigma data converters

    Creator:
    Chae, Jeong Seok
    Abstract:
    As CMOS processes keep scaling down devices, the maximum operating frequencies of CMOS devices increase, and hence circuits can process very wide band signals. Moreover, the small physical dimensions of transistors allow the placing of many more blocks into a single chip, including highly accurate analog blocks and complicated digital...
    Resource Type:
    Dissertation
    Full Text:
    Young, Jinzhou Cao, Chia-Hung Chen, Tao Tong, Tao Wang, Jiaming Lin, Po-Yao Ke, Jeff Pai, and Young

  • Low-power double-sampled delta-sigma modulator for broadband applications

    Creator:
    Shen, Weilun
    Abstract:
    High speed and high resolution analog-to-digital converter is a key building block for broadband wireless communications, high definition video applications, medical images and so on. By leveraging the down scaling of the latest CMOS technology and the noise shaping properties, delta-sigma (ΔΣ) ADCs are able to achieve wide-band operation and...
    Resource Type:
    Dissertation
    Full Text:
    , Tao Wang, Jiamin Lin, Ronghua Ni, Jinzhou Cao, Jeff Pai, Hurst Kuo, Jeong Seok Chae, Kyehyung Lee

  • High efficiency wideband low-power delta-sigma modulators

    Creator:
    Lee, Sang Hyeon
    Abstract:
    Delta-sigma analog-to-digital converters traditionally have been used for low speed, high resolution applications such as measurements, sensors, voice and audio systems. Through continued device scaling in CMOS technology and architectural and circuit level design innovations, they have even become popular for wideband, high dynamic range applications such as wired and...
    Resource Type:
    Dissertation
    Full Text:
    , Rishi Gupta, Jeff Pai, Xiaoran Gao, Tao Wang, Chia-Hung Chen, Jinzhou Cao, Jiaming Lin, Tao Tong, Po

  • A continuous time frequency translating delta Sigma Modulator

    Creator:
    Pulincherry, Anurag
    Abstract:
    This thesis presents a continuous time bandpass delta sigma modulator with frequency translation inside the delta sigma loop. The input IF signal is down converted to baseband after amplification by a low Q, wideband bandpass resonator. The down converted IF signal is digitized by a continuous time, second order lowpass...
    Resource Type:
    Masters Thesis
    Full Text:
    friends Arun, Jacob Zechmann, Kiseok, José Ceballos, Ranga, Mengzhe, Charlie Yun and Dr Wang for their

  • Wide-bandwidth, high-resolution delta-sigma analog-to-digital converters

    Creator:
    Zanbaghi, Ramin
    Abstract:
    There is a significant need in recent mobile communication and wireless broadband systems for high-performance analog-to-digital converters (ADCs) that have wide bandwidth (BW>5-MHz) and high data rate (>100-Mbps). A delta-sigma ADC is recognized as a power-efficient ADC architecture when high resolution (>12-b) is required. This is due to several advantages...
    Resource Type:
    Dissertation
    Full Text:
    , Ronghua Ni and Tao Wang without specific order in mind. Excellent support from Mrs. Ferne Simendinger

  • 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:
    Chinese friends Bo Wang, Yunteng Huang, Tao Shui, Min Shen, Yihai Xiang, Yuming Cao, Tao Sun, Xiangping