= Walt Kester
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<Walt Kester> is an <electrical engineer> whose technical writing concerns <data converters> and sampled-data electronics. He edited <The Data Conversion Handbook edited by Walt Kester>, which brings together converter architectures, testing, interfacing and practical circuit design.<The Data Conversion Handbook edited by Walt Kester>[Publisher's description and chapter list]{ref}
A useful distinction in this subject is between <signal sampling>, which selects values at particular times, and <quantization (signal processing)>, which selects a representable numerical level. An <analog-to-digital converter> combines both. Kester's explanation of the <Nyquist–Shannon sampling theorem> connects the sampling rate with the <frequencies> present at the converter input, making filtering part of the measurement design.<What the Nyquist Criterion Means to Your Sampled Data System Design by Walt Kester>[Sampled-data design and frequency limits]{ref}
Technical publications: https://www.analog.com/en/resources/technical-books/data-conversion-handbook.html
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