Digital sigma-delta modulator having a limiter circuit

Details Digital sigma-delta modulator having a limiter circuit Digital sigma-delta modulator having a limiter circuit

1991-09-19

1993-04-13

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

341143, 375 27, H03M 300

Patent

active

052026850

ABSTRACT:
A digital sigma-delta modulator comprises an adder, a quantizer, a subtracter, a filter circuit, and a limiter circuit. The adder adds input digital data and feedback data. The quantizer quantizes output data of the adder. The subtracter calculates a difference between output data of the quantizer and that of the adder. The filter circuit digitally processes output data of the subtracter to generate the feedback data. The limiter circuit is arranged in at least one position within an operation loop looping the adder, subtracter, and filter circuit and extracts (n-m)-bit data acquired by eliminating the significant m bit other than MSB from an n-bit data line.

REFERENCES:
patent: 4467316 (1984-08-01), Musmann et al.
patent: 4692737 (1987-09-01), Stikvoort et al.
patent: 4986159 (1991-01-01), Matsushima et al.
IEEE International Symposium on Circuits and Systems, pp. 372-375, May 1-3, 1990, T. C. Leslie, et al., "An Improved Sigma-Delta Modulator Architecture".
IEEE J. of Solid-State Circuits, vol. SC-22 No. 3, Jun. 1987, pp. 390-394, "A CMOS Stereo 16-Bit D/A Converter for Digital Audio" P. J. A. Naus et al.
IEEE Journal of Solid-State Circuits, vol. SC-16, No. 4, Aug. 1981, pp. 333-341 "Single-Chip Channel Codec with Filters", Misawa et al.
IEEE Transactions on Circuits and Systems, vol. CAS-25, No. 7, Jul. 1978, pp. 436-447 "Oversampled, Linear Predictive and Noise-Shaping Coders", Tewksbury et al.
"VSLI-A to D and D to A Converters with Multi-Stage Noise Shaping Modulators", ICASSP 86, Tokyo, pp. 1545-1548, Uchimura et al.
"A Multi-Stage Noise Shaping 16bit CMOS D to A Conversion LSI", EA 87-79, pp. 25-32, Matusya et al.

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