Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 8 of 8

Full-Text Articles in Engineering

Mixed-Signal Equalizer For Disk Drive Read Channel And Digital Calibration For Time-Interleaved A/D Converter , Huawen Jin Jan 2000

Mixed-Signal Equalizer For Disk Drive Read Channel And Digital Calibration For Time-Interleaved A/D Converter , Huawen Jin

Retrospective Theses and Dissertations

With the rapidly growing power of digital signal processor, the bottle neck of modern signal processing has been pushed forward to the analog front end. Therefore the implementation of high speed and high performance interface with mixed signal technique has become the focus of IC design. In this dissertation, two representative topics in this area are chosen to demonstrate the philosophy as well as the potential of such design;Hard disk storage system is the fastest developing technology during the past one decade. As the density keeps increasing, the read out channel must include signal equalization to control the Inter-Symbol-Interference ...


Low Bandgap Α-(Si,Ge):H And Α-(Ge):H Devices , Zhiyang Zhou Jan 2000

Low Bandgap Α-(Si,Ge):H And Α-(Ge):H Devices , Zhiyang Zhou

Retrospective Theses and Dissertations

In this research, alpha-(Si,Ge):H and alpha-(Ge):H devices are grown by electron cyclotron resonance plasma enhanced CVD technique and the electrical and optical properties of these devices under different plasma conditions are investigated;The ion bombardment during the growth can be enhanced by the low pressure, inert gas and substrate bias. The conclusion that low pressure leads to better quality of the material under hydrogen plasma because of higher ion bombardment is further verified by the space charge limited current (SCLC) method. The midgap defect density of states for the low pressure sample is lower than ...


High Speed Data Converter Techniques , Baiying Yu Jan 2000

High Speed Data Converter Techniques , Baiying Yu

Retrospective Theses and Dissertations

Moore's law not only applies to the semiconductor technology, it also applies to the Hard Disk Drive (HDD) system in the last 35 years. In order to meet the emerging demands of high performance computing application, HDD will continue to evolve in a very rapid pace. Very high speed analog-to-digital converters are demanded for Hard Disk Drive application.;FLASH architecture provides the highest speed using 2n-1 comparators to perform an n-bit conversion. In the extremes of speed, however, exotic technologies must still be used to achieve conversion rates beyond those obtained with a conventional silicon implementation. In this research ...


Photonic Bandgap Materials: Design, Fabrication, And Characterization , Ganapathi S. Subramania Jan 2000

Photonic Bandgap Materials: Design, Fabrication, And Characterization , Ganapathi S. Subramania

Retrospective Theses and Dissertations

The last few decades have seen a tremendous explosion in the area of new synthetic materials. As we begin to better understand the nature of the atomic and molecular bonds it has been possible to systematically search for materials with specific properties thanks to the availability of powerful supercomputers. Due to significant advances in materials synthesis a rich variety of artificial materials whose mechanical, chemical, electronic and optical properties can be suitably tailored can now be produced. Some of the materials (plastics, synthetic fibers, ceramics, alloys etc.) can replace or substitute traditional materials; some others have managed to create new ...


Low Power Data Converters For Specific Applications , Siamak Mortezapour Jan 2000

Low Power Data Converters For Specific Applications , Siamak Mortezapour

Retrospective Theses and Dissertations

Due to increasing importance of portable equipment and reduction of the supply voltage due to technology scaling, recent efforts in the design of mixed-signal circuits have focused on developing new techniques to reduce the power dissipation and supply voltage. This requires research into new architectures and circuit techniques that enable both integration and programmability. Programmability allows each component to be used for different applications, reducing the total number of components, and increased integration by eliminating external components will reduce cost and power;Since data converters are used in many different applications, in this thesis new low voltage and low power ...


Low Jitter Design Techniques For Monolithic Cmos Phase-Locked And Delay-Locked Systems , Lin Wu Jan 2000

Low Jitter Design Techniques For Monolithic Cmos Phase-Locked And Delay-Locked Systems , Lin Wu

Retrospective Theses and Dissertations

Timing jitter is a major concern in almost every type of communication system. Yet the desire for high levels of integration works against minimization of this error, especially for systems employing a phase-locked loop (PLL) or delay-locked loop (DLL) for timing generation or timing recovery. There has been an increasing demand for fully-monolithic CMOS PLL and DLL designs with good jitter performance. In this thesis, the system level as well as the transistor level low jitter design techniques for integrated PLLs and DLLs have been explored.;On the system level, a rigorous jitter analysis method based on a z-domain model ...


Growth And Characterization Of Crystalline Ge[Subscript 1-X] C[Subscript X] Thin Films And Devices , Jason Thomas Herrold Jan 2000

Growth And Characterization Of Crystalline Ge[Subscript 1-X] C[Subscript X] Thin Films And Devices , Jason Thomas Herrold

Retrospective Theses and Dissertations

Alloys of Group IV elements have been routinely studied because new materials can be developed for microelectronic applications in extreme environments, high frequency applications, high efficiency optoelectronic devices or high power density circuits. One of the greatest practical benefits of these materials is that they can be made to work with established Si fabrication technologies, thus greatly reducing the difficulty in manufacturing devices made from these materials. However, there is a Group IV alloy that has remained virtually unexplored, the crystalline Ge:C system, as Ge and C are insoluble in one another at all temperatures and pressures. However, it ...


Modeling And Design Of Matching-Critical Circuits , Mao-Feng Lan Jan 2000

Modeling And Design Of Matching-Critical Circuits , Mao-Feng Lan

Retrospective Theses and Dissertations

Existing approaches for modeling mismatch effects in matching-critical circuits are based upon models derived under the widely accepted premise that distributed parameter devices can be modeled with lumped parameter models. It is shown in this dissertation that the lumped parameter models do not consistently reflect device performance and introduce substantial errors in matching-critical circuits if either systematic or random parameter variations occur in the channel. A new approach for characterizing the effects of both systematic and random variations in semiconductor device properties on device matching is introduced. This approach circumvents the introduction of model errors inherent in the existing approaches ...