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AC and DC Data Acquisition Signal Chains Made Easy Sampling phenomena in analog-to-digital converters (ADCs) induce the problems of aliasing and capacitive kickback, and to solve these problems, designers use filters and driving amplifiers that introduce their own sets of challenges. This makes achieving precision dc and ac performance in medium bandwidth application areas a challenge and designers end up trading off system goals to do so. This article describes continuous-time sigma-delta(∑-Δ) ADCs that inherently and dramatically solve the sampling problems by simplifying signal chains. They remove the need for antialiasing filters and buffers, and solve signal chain offset errors and drift issues associated with the additional components. These benefits shrink the solution size, ease solution design, and improve the phase matching and overall latency of the system.

Roberto maurinoAbhilasha kawleGaborc temesWasim shaikhSrikanth nittalaJohn wileyAnalog devicesPune universityIndian institute of technologyPrecision converters departmentFundamentals digitizationCombating challengesPrecision performance forSwitched capacitor inputContinuous time sigma deltaInherent antialiasing moving