UMD Theses and Dissertations

Permanent URI for this collectionhttp://hdl.handle.net/1903/3

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a given thesis/dissertation in DRUM.

More information is available at Theses and Dissertations at University of Maryland Libraries.

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Author: search.filters.author.Lauritzen, Keir ChristianSubject: search.filters.subject.compressing

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    A Novel Compressing Analog-to-Digital Converter
    (2005-04-29) Lauritzen, Keir Christian; Peckerar, Martin C; Electrical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Analog-to-digital converters form the backbone of many real world systems. A compression and expansion (companding) capability is a useful tool to increase the signal-to-noise ratio of many of these applications. Frequently, power-signal systems utilize analog compression to simplify signal processing. A novel compressing high-speed converter is presented in this thesis. The converter described here has a natural compressing transfer function of f(x)=1-1/x. The converter is a variation on Flash conversion, so it is high speed, with a sampling frequency of 80MHz. A four bit implementation of this converter was manufactured on a 0.5μm CMOS process with an area of 0.018mm2. The power consumed was 50mW on a first pass design. The compressing converter will to scale with process improvements. The converter desensitizes the linear region to reference mismatch, and arbitrary compressing transfer functions can be obtained.