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- W2892743721 abstract "This paper presents a power- and area-efficient approach to digitizing the echo signals received by piezoelectric transducer elements, commonly used for ultrasound imaging. This technique utilizes such elements not only as sensors but also as the loop filter of an element-level <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$Delta Sigma $ </tex-math></inline-formula> analog to digital converter (ADC). The receiver chain is thus greatly simplified, yielding savings in area and power. Every ADC becomes small enough to fit underneath a <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$150,,mu mathrm {m} times 150,,mu mathrm {m}$ </tex-math></inline-formula> transducer element, enabling simultaneous acquisition and digitization from all the elements in a 2-D array. This is especially valuable for miniature 3-D probes. Experimental results are reported for a prototype receiver chip with an array of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$5 times 4$ </tex-math></inline-formula> element-matched ADCs and a transducer array fabricated on top of the chip. Each ADC consumes 800 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$mu mathrm {W}$ </tex-math></inline-formula> from a 1.8 V supply and achieves a SNR of 47 dB in a 75% bandwidth around a center frequency of 5 MHz." @default.
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- W2892743721 date "2018-10-01" @default.
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- W2892743721 title "An Element-Matched Electromechanical <inline-formula> <tex-math notation=LaTeX>$DeltaSigma$ </tex-math> </inline-formula> ADC for Ultrasound Imaging" @default.
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- W2892743721 doi "https://doi.org/10.1109/jssc.2018.2859961" @default.
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