Oversampling D/A converter and method for shaping nonlinear...

Details Oversampling D/A converter and method for shaping nonlinear... Oversampling D/A converter and method for shaping nonlinear...

2007-12-11

2007-12-11

Phu, Phuong (Department: 2611)

Pulse or digital communications

Pulse code modulation

Differential

C375S348000, C375S216000, C341S143000

Reexamination Certificate

active

10749575

ABSTRACT:
A method and a device for spectrally shaping nonlinear intersymbol interference (NLISI) in an oversampling digital-to-analog converter are disclosed. At least one higher-order shaper circuit is provided, so as to shape NLISI, causing energy associated with NLISI to fall outside a signal band. The signal-to-noise ratio achieved is better than signal-to-noise rations obtained in prior art NLISI reducing methods and devices.

REFERENCES:
patent: 6005505 (1999-12-01), Linz
patent: 6727832 (2004-04-01), Melanson
patent: 6822594 (2004-11-01), Melanson et al.
Adams, R., et al., “A 113-db SNR Oversampling DAC with Segmented Noise-Shaped Scrambling,”IEEE Journal of Solid-State Circuits, vol. 33, No. 12, pp. 1871-1878 (Dec. 1998).
Adams, R., et al., “Stability Theory for ΔΣ Modulators,”Delta-Sigma Data Converters, IEEE Press, New Jersey, pp. 141-152 (1997).
Proakis, J.G., et al.,Communication Systems Engineering, Prentice Hall, New Jersey, pp. 276-282 (1994).
Rugh, W.,Nonlinear System Theory: The Volterra/Wiener Approach, Johns Hopkins University Press, London, pp. 253-255 (1981).
Su, D.K., et al., “A CMOS Oversampling D/A Converter with a Current-Mode Semi-Digital Reconstruction Filter,”IEEE International Solid-State Circuits Conference, pp. 230-231 (1993).
Weiner, D., et al.,Sinusoidal Analysis and Modeling of Weakly Nonlinear Circuits with Application to Nonlinear Interference Effects, Van Nostrand Reinhold Company, New York, pp. 82-84 (1980).

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