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The optimal design of SAR ADCs requires the accurate estimate of nonlinearity and parasitic effects in the feedback charge-redistribution DAC. Since the effects of both mismatch and stray capacitances depend on the specific array topology, complex calculations, custom modeling and heavy simulations in common circuit design environments are often required. This paper presents a novel MATLAB-based numerical...
The conventional binary weighted array SAR ADC is the common topology adopted to achieve high efficiency conversion, i.e. with less than 10 fJ/conversion-step, even requiring extra effort to design and simulate full custom sub-fF capacitors. This paper presents the design and the optimization of an asynchronous SAR ADC with attenuation capacitor achieving an efficiency similar to conventional binary...
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