Linearity enhancement of multibit /spl Delta//spl Sigma/ A/D and D/A converters using data weighted averaging
作者： R.T. Baird , T.S. Fiez
DOI: 10.1109/82.476173
关键词:
摘要: A dynamic element matching algorithm, data weighted averaging, is introduced for use in multibit /spl Delta//spl Sigma/ converters. Using this distortion spectra from DAC linearity errors are shaped by first-order noise shaping, resulting a range improvement of 9 dB/octave when dominate. Combining technique with random dithering nearly eliminates the aliasing into baseband. Simulations show that only 1% 110 dB signal-to-noise ratio (18 b) achieved third-order 3-b modulator an oversampling 128.
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