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- W2289656557 abstract "This thesis proposes an alternate paradigm for designing computers using continuoustime analog circuits. Digital computation sacrifices continuous degrees of freedom. A principled approach to recovering them is to view analog circuits as propagating probabilities in a message passing algorithm. Within this framework, analog continuous-time circuits can perform robust, programmable, high-speed, low-power, cost-effective, statistical signal processing. This methodology will have broad application to systems which can benefit from low-power, high-speed signal processing and offers the possibility of adaptable/programmable high-speed circuitry at frequencies where digital circuitry would be cost and power prohibitive. Many problems must be solved before the new design methodology can be shown to be useful in practice: Continuous-time signal processing is not well understood. Analog computational circuits known as “soft-gates” have been previously proposed, but a complementary set of analog memory circuits is still lacking. Analog circuits are usually tunable, rarely reconfigurable, but never programmable. The thesis develops an understanding of the convergence and synchronization of statistical signal processing algorithms in continuous time, and explores the use of linear and nonlinear circuits for analog memory. An exemplary embodiment called the Noise Lock Loop (NLL) using these design primitives is demonstrated to perform direct-sequence spread-spectrum acquisition and tracking functionality and promises order-of-magnitude wins over digital implementations. A building block for the construction of programmable analog gate arrays, the “soft-multiplexer” is also proposed. Thesis Supervisor: Neil Gershenfeld Title: Associate Professor" @default.
- W2289656557 created "2016-06-24" @default.
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- W2289656557 date "2003-01-01" @default.
- W2289656557 modified "2023-09-23" @default.
- W2289656557 title "Analog Logic: Continuous-Time Analog Circuits for Statistical Signal Processing" @default.
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