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Observations Concerning the Generation of Spurious Tones in Digital Delta-Sigma Modulators Followed by a Memoryless Nonlinearity

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3 Author(s)
Hosseini, K. ; Cypress Semicond., Cork, Ireland ; Fitzgibbon, B. ; Kennedy, M.P.

In mixed-signal systems, nonlinear distortion due to nonideal analog circuitry can act on quantized digital sequences, giving rise to spurious tones. In this brief, generation of spurious tones in digital delta-sigma modulators, followed by memoryless nonlinearity, is investigated. Inherent modulator periodicity that persists even with the use of least-significant-bit dither is identified.

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Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:58 ,  Issue: 11 )