Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1997-04-17
1998-11-17
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341144, 341155, H03M 300
Patent
active
058382720
ABSTRACT:
The performance of sigma delta analog to digital conversion systems is enhanced by instrumenting the modulator with an observation circuit which provides quantized estimates of the modulator's state values. These state estimates are filtered separately and the result is added to the output of the decimator. This technique lowers the noise floor of the signal band and achieves performances better than those predicted by the spectrum of the modulator output. Error Correcting is particularly well suited to very low oversampling ratios. Finally, the correction is calculated and added in the digital domain so that this technique can be employed with existing architectures with only minor modifications.
REFERENCES:
patent: 5068661 (1991-11-01), Kaneaki et al.
patent: 5124705 (1992-06-01), Voorman
patent: 5153593 (1992-10-01), Walden et al.
patent: 5181032 (1993-01-01), Ribner
patent: 5341135 (1994-08-01), Pearce
patent: 5736950 (1998-04-01), Harris et al.
patent: 5742246 (1998-04-01), Kou et al.
Boser, et al., "The Design of Sigma-Delta Modulation Analog-to Digital Converters," IEEE J. Solid-State Circuits, vol. SC-23, No. 6, pp. 1298-1308 (Dec. 1988).
Shoji, et al., "Improved Double Integration Delta-Sigma Modulations for A to D and D to A Conversion," IEEE Proc. ISCAS '87, pp. 451-454 (May 1987).
Cataltepe, et al., "Digitally Corrected Multi-Bit .SIGMA..DELTA. Data Converters," IEEE Proc. ISCAS'89, vol. 37, No. 3, pp. 647-650 (May 1989).
Candy, "A Use of Double Integration in Sigma Delta Modulation," IEEE Trans. Commun. vol. COM-33, No. 3, pp. 249-258 (Mar. 1985).
Candy, "Using Triangulary Weighted Interpolation to Get 13-Bit PCM from a Sigma-Delta Modulator," IEEE Trans. Commun., vol. Com-24, pp. 1268-1275 (Nov. 1976).
Steiner Philip
Yang Woodward
President and Fellows of Harvard College
Young Brian K.
LandOfFree
Error correcting sigma-delta modulation decoding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Error correcting sigma-delta modulation decoding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Error correcting sigma-delta modulation decoding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-888470