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Filtering by: Creator Wenny, David Lee Remove constraint Creator: Wenny, David Lee Advisor Allstot, David J. Remove constraint Advisor: Allstot, David J.

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  • MOS switched-current biquadratic filters

    Creator:
    Lee, Bor
    Abstract:
    A MOS biquadratic (biquad) filter employing the switched-current technique is reported. The circuit uses current-mode processing which can offer wide bandwidth, low voltage operation, and can be implemented with standard CMOS technology. Examples of lowpass, highpass, and bandpass filters are given which illustrate the synthesis procedures and the versatility of...
    Resource Type:
    Masters Thesis
    Full Text:
    , Feb. 1990. (To be published) [5] Ringo W. Lee, Tern S. Fiez, Howard C. Yang and David J. Allstot

  • Distortion analysis of switched-current circuits

    Creator:
    Lee, Wing-sun R.
    Abstract:
    Recently, switched-current circuits have received great attention because they offer potentially better performance in terms of speed, low voltage power supplies, and accuracy in mixed-mode analog-digital signal processing. In this thesis, the distortion characteristics, DC offset and AC gain errors induced by the threshold voltage, channel width, channel length, and...
    Resource Type:
    Masters Thesis
    Full Text:
    ABSTRACT OF THE THESIS OF Wing-sun R. Lee for the degree of Master of Science in Electrical and Computer

  • Design and computer aided optimization of a fully integrated CMOS RF distributed amplifier

    Creator:
    Ballweber, Brian M.
    Abstract:
    Advancements in the sophistication and complexity of modern electronic systems are creating a need for highly integrated systems with ever higher operational frequencies. The economical demands of these systems dictate that they be implemented using low cost fabrication technologies, such as digital CMOS. One of the major challenges facing circuit...
    Resource Type:
    Masters Thesis
    Full Text:
    . I would like also to thank Professor Andreas Weisshaar, Professor Ben Lee, and Professor David

  • A study of the temperature dependence of the DC current-voltage characteristics of AlGaAs/GaAs heterojunction bipolar transistors with application to bandgap voltage reference sources

    Creator:
    Gazeley, William G.
    Abstract:
    The bandgap voltage reference technique, as implemented in Silicon technology, has evolved to a state of advanced development and become the method of choice for temperature independent voltage biasing in integrated circuits. The heterojunction bipolar transistor (HBT), fabricated from epitaxial A1GaAs /GaAs, is developing to a point where basic circuit...
    Resource Type:
    Masters Thesis
    Full Text:
    Transistors with Application to Bandgap Voltage Reference Sources. Abstract approved: david J. Allstot The

  • CMOS low noise amplifier design utilizing monolithic transformers

    Creator:
    Zhou, Jianjun J.
    Abstract:
    Full integration of CMOS low noise amplifiers (LNA) presents a challenge for low cost CMOS receiver systems. A critical problem faced in the design of an RF CMOS LNA is the inaccurate high-frequency noise model of the MOSFET implemented in circuit simulators such as SPICE. Silicon-based monolithic inductors are another...
    Resource Type:
    Dissertation
    Full Text:
    Utilizing Monolithic Transformers. Abstract approved: David J. Allstot Full integration of CMOS low noise

  • Fully-differential current-mode CMOS circuits and applications

    Creator:
    Zele, Rajesh H.
    Abstract:
    With increasing interest in current-mode analogue processing due to its high performance properties such as speed, bandwidth and accuracy compared to voltage-mode processing, new current-mode alternatives to various conventional circuit designs are appearing. In this report, a novel circuit design to construct a fully-differential current-mode operational amplifier ( OP-AMP )...
    Resource Type:
    Masters Thesis
    Full Text:
    . Toumazou, F. Lidgey and D. Haigh, lEE Circuits and Systems Series 2, Peter Peregrinus Ltd.. pp. 127 178

  • Operational amplifier compensation using doublet-decompression for switched-capacitor circuits

    Creator:
    Jen, Shin D.
    Abstract:
    A frequency compensation technique for increasing the settling speed of two-stage operational amplifiers used in switched-capacitor applications has been developed. By properly decompressing the pole-zero doublet to form a three-pole one zero system, the settling speed is increased up to 50 percent as compared to the optimized two-pole system.
    Resource Type:
    Masters Thesis
    Full Text:
    approved: , Redacted for Privacy David J. Alistot A frequency compensation technique for increasing the

  • High speed analog circuit design using the heterostructure insulated gate field effect transistor

    Creator:
    Smith, Alexander B.
    Abstract:
    As Si MOS approaches its maximum limits in speed and bandwidth, new devices are desired to meet the needs of high speed communications and signal processing. A device that exhibits superior performance to Si MOS, BJT, and GaAs technology is the HEMT (high electron mobility transistor). The HEMT offers superior...
    Resource Type:
    Masters Thesis
    Full Text:
    approved. - David J. Allstot As Si MOS approaches its maximum limits in speed and bandwidth, new devices

  • A P-well GaAs MESFET technology

    Creator:
    Canfield, Philip C.
    Abstract:
    The semiconductor gallium arsenide (GaAs) has many potential advantages over the more widely used semiconductor silicon (Si). These include higher low field mobility, semi-insulating substrates, a direct band-gap, and greater radiation hardness. All these advantages offer distinct opportunities for implementation of new circuit functions or extension of the operating conditions...
    Resource Type:
    Dissertation

  • Low-voltage Tracking RC Compensated OTA and a Rail-to-Rail Input and Output Operational Amplifier

    Creator:
    Kuo, Yu-Wen
    Abstract:
    The operational transconductance amplifier (OTA) is a fundamental building block in analog and mixed-signal systems. This research describes a process-, voltage-, and temperature- (PVT) insensitive low-voltage tracking RC compensation scheme considered for two-stage CMOS OTAs, which cancels the pole due to the load capacitance using a Miller zero generated by...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ David J. Allstot The operational transconductance amplifier (OTA) is a fundamental

  • High accuracy CMOS switched-current ladder filters

    Creator:
    Hoei, Jung-sheng
    Abstract:
    Clock-feedthrough effects, channel-length modulation and device mismatch are the main causes of the inaccuracy of Switched-Current (SI) circuits. In this paper, these non-ideal effects are analyzed. A high-performance current mirror, namely regulated cascode current mirror, which eliminates drain voltage variation problem is introduced. By using this current mirror as a...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for Privacy David J. Allstot Clock-feedthrough effects, channel-length modulation and

  • Switched-current logic for digital circuit design

    Creator:
    Subramanian, Vivek
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for privacy David J. Allstot A current-mode concept for digital integrated circuit

  • Design and computer-aided optimization of RF CMOS power amplifiers

    Creator:
    Gupta, Ravi
    Abstract:
    In recent years, there has been an extensive effort to develop low-cost implementations of radio frequency integrated circuits for consumer applications. This thesis is a research effort in the design and implementation of integrated RF CMOS Power Amplifiers (PAs). A significant challenge in the implementation of RF CMOS ICs is...
    Resource Type:
    Dissertation
    Full Text:
    of RF CMOS Power Amplifiers. Abstract approved: David J. Alistot In recent years, there has

  • Current mode analog and digital circuit design

    Creator:
    Liang, Guojin
    Abstract:
    In this dissertation, two important current mode circuit design subjects have been explored. In the first part, the switched-current circuit technique has been investigated. The fundamental performance and limitations of this technique are explored. One of the major limitations, the signal distortion caused by clock feedthrough has been substantially reduced...
    Resource Type:
    Dissertation
    Full Text:
    for privacy Abstract approved: _ David J. Allsiot In this dissertation, two important current mode

  • Modeling of subthreshold current of GaAs MESFET and the design of voltage reference circuit

    Creator:
    Or, Pee-Keong
    Abstract:
    The characteristic of the subthreshold current in a GaAs MESFET exhibits a negative exponential function with Vgs. After studying the behavior of this current in this region over a range of temperature and drain bias voltages, a subthreshold current model was developed. The model was implemented in a circuit simulation...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for Privacy David Allstot The characteristic of the subthreshold current in a GaAs

  • Sensor Interface Circuit Design towards CMOS Scaling

    Creator:
    Liu, Jialin
    Abstract:
    Sensor system plays an important role in connecting everything including human body to the electrical information systems that we have built and that we are going to build, to make the world more intelligent and efficient. One of the key propulsive forces behind these emerging techniques is CMOS scaling that...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ David J. Allstot Sensor system plays an important role in connecting everything

  • Switch-capacitor Power Amplifier with Enhanced Power Back-off Efficiency and Linearity

    Creator:
    Qiao, Bo
    Abstract:
    Nowadays, wireless communication systems use high-order quadrature amplitude modulation (QAM) together with orthogonal frequency-division multiplexing (OFDM) to increase the link capacity and robustness. These signals always have large peak-to-average power ratio (PAPR) and require power amplifiers (PAs) achieve both high efficiency and linearity simultaneously. For the efficiency, the complementary metal...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: ______________________________________________________ David J. Allstot