Index Catalog // ScholarsArchive@OSU

A delta-sigma pulse width modulator with pulse dithering

Creator:: Lewison, Richard S.
Abstract:: Pulse Width Modulation (PWM) has been used extensively for motor control, DC-AC converters, DC-DC converters and in audio applications. The conventional method of generating a pulse width modulated signal involves generating an accurate sawtooth or triangle wave using analog circuits. In CMOS, being analog circuit intensive puts extra constraints on...
Resource Type:: Masters Thesis

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

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

A universal CMOS current-mode operational amplifier

Creator:: Botelho, Cindy
Abstract:: It has become customary in electrical engineering to think of signal processing in terms of voltage variables to the exclusion of current variables. This tendency has resulted in voltage signal processing circuits such as voltage-controlled voltage sources (VCVS) and voltage-mode operational amplifiers. However, the VCVS operational amplifier has several limitations...
Resource Type:: Masters Thesis

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

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

Current-feedthrough cancellation technique for current-mode T/H circuits

Creator:: Young, David Y. W.
Abstract:: In this paper, an analysis of the clock-feedthrough effects in switched-current (SI)' circuits will be presented. The clock-feedthrough effects caused by the non-ideal characteristic of MOS switches when they are turned off limit the accuracy of the analog track-and-hold (T/H) circuits. A model to analyze and characterize this effect is...
Resource Type:: Masters Thesis

Current-feedthrough cancellation techniques in switched-current circuits

Creator:: Lao, Paul A.
Resource Type:: Masters Thesis

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

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

Design of CMOS switched-current filters

Creator:: Fiez, Theresa S.
Abstract:: The design and implementation of Switched-Current (SI) ladder filters is described. SI filters require only a standard digital CMOS process and the power supply voltage requirement is low. SI circuits also can be potentially operated at higher frequencies than Switched-Capacitor (SC) filters due to the low-impedance wideband nodes of the...
Resource Type:: Dissertation

Design of high-performance operational amplifiers using an embedded compensation technique

Creator:: Ziazadeh, Ramsin M.
Resource Type:: Masters Thesis

Design of high-speed adaptive parallel multi-level decision feedback equalizer

Creator:: Xiang, Yihai
Abstract:: Multi-level decision feedback equalization (MDFE) is an effective technique to remove inter-symbol interference (ISI) from disk readback signals, which uses the simple architecture of decision feedback equalization. Parallelism which doubles the symbol rate can be realized by setting the first tap of the feedback filter to zero. A mixed-signal implementation...
Resource Type:: Masters Thesis

Design of high-speed low-power analog CMOS decision feedback equalizers

Creator:: Su, Wenjun
Abstract:: Decision feedback equalizer (DFE) is an effective method to remove inter-symbol interference (ISI) from a disk-drive read channel. Analog IC implementations of DFE potentially offers higher speed, smaller die area, and lower power consumption when compared to their digital counterparts. Most of the available DFE equalizers were realized by using...
Resource Type:: Masters Thesis

Design of high-speed summing circuitry and comparator for adaptive parallel multi-level decision feedback equalization

Creator:: Gao, Hairong
Abstract:: Multi-level decision feedback equalization (MDFE) is an effective sampled signal processing technique to remove inter-symbol interference (ISI) from disk read-back signals. Parallelism which doubles the symbol rate can be realized by utilizing the characteristic of channel response and decision feedback equalization algorithm. A mixed-signal IC implementation has been chosen for...
Resource Type:: Masters Thesis

Digitally-programmable switched-current filters

Creator:: Yesilyurt, Ayse Gul
Abstract:: Digitally-programmable filters have been an ongoing research topic for a number of years. The first such filters were FIR transversal filters using Charge-Coupled Devices (CCD's) and IIR recursive filters using switched-capacitor (SC) techniques. Although both techniques achieve excellent results, they require non-standard and/or additional IC fabrication steps. Low substrate doping...
Resource Type:: Masters Thesis

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

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

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

Power amplifier design in digital CMOS processes

Creator:: Forejt, Brett E.
Abstract:: The ability to integrate designs from board level, multi-chip modules to single process solutions is highly attractive in today's PC multimedia industry. Saving board area and chip count will decrease the production cost of personal computing hardware and increase profitability. The ability to integrate analog circuit capability and it's reference...
Resource Type:: Masters Thesis

Switched-current logic for digital circuit design

Creator:: Subramanian, Vivek
Resource Type:: Masters Thesis

ScholarsArchive@OSU

A delta-sigma pulse width modulator with pulse dithering

A P-well GaAs MESFET technology

A photodetecting device that rejects ambient light

A universal CMOS current-mode operational amplifier

CMOS low noise amplifier design utilizing monolithic transformers

Current mode analog and digital circuit design

Current-feedthrough cancellation technique for current-mode T/H circuits

Current-feedthrough cancellation techniques in switched-current circuits

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

Design and computer-aided optimization of RF CMOS power amplifiers

Design of CMOS switched-current filters

Design of high-performance operational amplifiers using an embedded compensation technique

Design of high-speed adaptive parallel multi-level decision feedback equalizer

Design of high-speed low-power analog CMOS decision feedback equalizers

Design of high-speed summing circuitry and comparator for adaptive parallel multi-level decision feedback equalization

Digitally-programmable switched-current filters

Fully-differential current-mode CMOS circuits and applications

High accuracy CMOS switched-current ladder filters

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

Power amplifier design in digital CMOS processes

Switched-current logic for digital circuit design

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