Analog-to-digital converter using parallel .DELTA..SIGMA. modula

Details Analog-to-digital converter using parallel .DELTA..SIGMA. modula Analog-to-digital converter using parallel .DELTA..SIGMA. modula

1992-02-21

1993-03-23

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

375 28, H03M 302

Patent

active

051968525

ABSTRACT:
An approach is presented for relaxing the oversampling requirements in a .DELTA..SIGMA. modulator based analog-to-digital converter through parallel .DELTA..SIGMA. modulation channels with decimation filtering and modulation by sequences u.sub.r (n) and v.sub.r (n) derived, for example, from an M.times.M Hadamard matrix. By combining M .DELTA..SIGMA. modulators, each with an oversampling ratio of N, an effective oversampling ratio of approximately NM is achieved with only an M-fold increase in the quantization noise power. In the special case of N=1, full-rate analog-to-digital conversion is achieved. The individual .DELTA..SIGMA. modulators can be any selected from a large class of popular .DELTA..SIGMA. modulators. Unlike most other approaches to trading modulator complexity for accuracy, the system retains the robustness of the individual .DELTA..SIGMA. modulators to circuit imperfections.

REFERENCES:
patent: 5073777 (1991-12-01), Fukuhara et al.
patent: 5075679 (1991-12-01), Gazsi
J. C. Candy, et al., "Oversampling Methods for A/D and D/A Converters," Oversampling Delta-Sigma Data Converters, Theory, Design and Simulations, edited by J. D. Candy and G. C. Temes, pp. 1-25, IEEE Press, New York, 1992.
J. C. Candy, "A use of double integration in sigma-delta modulation," IEEE Trans. Commun., vol. COM-33, pp. 249-258, Mar. 1985.
M. Hall, Jr., Combinatorial Theory, (2nd Ed.), pp. 238-263, John Wiley & Sons, 1967.
F. H. Harmuth, Sequency Theory, pp. 143-150, New York, New York, Academic Press, 1977.
L. C. Fernandez, et al., "Design of a synchronous Walsh-Function Generator," IEEE Trans. Electromagnetic Compatibility, vol. EMC-19, No. 4, pp. 407-409, Nov. 1977.
F. Kitai, et al., "Walsh function generators," Applications of Walsh functions and sequency theory, pp. 297-315, IEEE Press, New York, 1974.
P. W. Besslich, "Walsh function generators for minimum orthogonality error," Trans. Electromagnetic Compatibility, vol. EMC-15, No. 4, pp. 177-179, Nov., 1973.
J. H. van Lint, et al., A Course if Combinatorics, Cambridge University Press, (to appear in 1992).
S. H. Ardalan, et al., "An Analysis of Nonlinear Behavior in Delta-Sigma Modulators," IEEE Trans. Circuits and Sys., vol. CAS-34, 593-603, Jun., 1987.
J. C. Candy, "A Use of Limit Cycle Oscillations to Obtain Robust Analog-to-Digital Converters", IEEE Trans. Commun., vol. Com-22, pp. 298-305, Mar. 1974.
W. Chou, et al., "Multistage Sigma-Delta Modulation" IEEE Trans. Inform. Theory, vol. IT-35, pp. 784-796, Jul. 1989.
R. M. Gray, "Oversampled Sigma-Delta Modulation," IEEE Trans. Commun., vol. COM-35, pp. 481-489, May 1987.
J. C. Candy, et al., "Using Triangularly Weighted Interpolation to Get 13-Bit PCM from a Sigma-Delta Modulator," IEEE Trans. Commun., vol. COM-24, pp. 1268-1275, Nov. 1976.
A. Ghafoor, "Partitioning of Even Networks for Improved Diagnosability," IEEE Transactions on Reliability, vol. 39, No. 3, pp. 281-286, Aug. 1990.

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