Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1993-12-21
1995-08-15
Hoff, Marc S.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
375254, H03M 302
Patent
active
054423546
ABSTRACT:
A method of cascading two second-order sigma-delta modulators includes the steps of feeding the input to the quantizer of the first stage to the second stage. This input is, effectively, the difference between the output of the first second-order loop and the quantization noise of the first modulator. The method also includes the step of removing both the quantization noise from the first loop as well as the output from the first loop from a final output, y.sub.out.
REFERENCES:
patent: 4920544 (1990-04-01), Endo et al.
patent: 5061928 (1991-10-01), Karema et al.
patent: 5065157 (1991-11-01), Ribner et al.
patent: 5084702 (1992-01-01), Ribner
patent: 5148166 (1992-09-01), Ribner
patent: 5148167 (1992-09-01), Ribner
patent: 5153593 (1992-10-01), Walden et al.
patent: 5283278 (1994-02-01), Ribner et al.
patent: 5298900 (1994-03-01), Mauthe et al.
Matsuya, et al., "A 16-Bit Oversampling A-to-D Conversion Technology Using Triple-Integration Noise Shaping", IEEE Journal of Solid State Circuits, vol. SC-22, No. 6, pp. 921-929, Dec. 1987.
Ribner, et al., "A Third-Order Multistage Sigma-Delta Modulator With Reduced Sensitivity To Nonidealities", IEEE Journal of Solid-State Circuits, vol. 26, No. 12, pp. 1764-1774, Dec. 1991.
Chao, et al., "A Higher Order Topology For Interpolative Modulators For Oversampling A/D Converters", IEEE Transactions on Circuits and Systems, vol. 37, No. 3, pp. 309-318, Mar. 1990.
Advanced Micro Devices , Inc.
Hoff Marc S.
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