Accumulator for adaptive Σ-Δ modulation

Details Accumulator for adaptive Σ-Δ modulation Accumulator for adaptive Σ-Δ modulation

2005-04-26

2005-04-26

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000

Reexamination Certificate

active

06885326

ABSTRACT:
A system and method for adaptive sigma-delta modulation. The system includes a input stage that produces a difference signal representing the difference between an analog input signal x(n) and a analog feedback signal z(n), the amplitude of the analog input signal x(n) within a first range [−a, +a]. An accumulator stage produces a accumulated signal that is a function of an accumulation of the difference signal, the accumulator stage transforming the accumulation of the difference signal so as to increase average magnitude while ensuring instantaneous magnitude does not exceed a predetermined value. A quantization stage produces a quantized digital signal y0(n) representing the accumulated signal. Based on the quantized digital signal y0(n), a adaptation stage produces a digital output signal z0(n), which is converted to the analog feedback signal z(n) by a digital-to-analog converter stage.

REFERENCES:
patent: 2918042 (1959-12-01), Werner
patent: 4071825 (1978-01-01), McGuffin
patent: 4233684 (1980-11-01), Eggermont
patent: 4384278 (1983-05-01), Benjamin
patent: 4612654 (1986-09-01), DeFreitas
patent: 4633196 (1986-12-01), Peled et al.
patent: 4700362 (1987-10-01), Todd et al.
patent: 4789862 (1988-12-01), Jackson
patent: 4829299 (1989-05-01), Mandell
patent: 4937577 (1990-06-01), Rich et al.
patent: 4940977 (1990-07-01), Manell
patent: 5012245 (1991-04-01), Scott et al.
patent: 5027306 (1991-06-01), Dattorro et al.
patent: 5030952 (1991-07-01), Ledzius et al.
patent: 5144306 (1992-09-01), Masuda
patent: 5305004 (1994-04-01), Fattaruso
patent: 5323157 (1994-06-01), Ledzius et al.
patent: 5357252 (1994-10-01), Ledzius et al.
patent: 5408235 (1995-04-01), Doyle et al.
patent: 5549658 (1996-08-01), Shannon et al.
patent: 5601617 (1997-02-01), Loeb et al.
patent: 5626629 (1997-05-01), Faltys et al.
patent: 5959562 (1999-09-01), Wiesbauer
patent: 5974089 (1999-10-01), Tripathi et al.
patent: 6501329 (2002-12-01), Petrofsky et al.
patent: 6661363 (2003-12-01), Zierhofer
patent: WO 0209292 (2002-01-01), None
Edited by Norsworthy et al., Delta-Sigma Data Converters: Theory, Design and Simulation; Edited by Norsworthy, et al.; IEEE Press, New York, NY 1997.
Edited by Candy et al., Oversampling Delta-Sigma Data Converters: Theory, Design and Simulation; Edited by Candy, et al.; IEEE Press, New York, NY 1992.
Clemens M. Zierhofer, Adaptive Sigma Delta Modulation with One-bit Quantization, May 2000, IEEE, vol. 47, No. 5, pp. 408-115.
Sakane et al., Two-bit Instanteiously Adaptive Delta Modulation for PCM Encoding, Database Inspec Online! Institute of Electrical Engineers, Stevenage, GB; Database Accession No. 1220789 XP002224775, abstract. The whole document: Radio and Electronic Engineer, Apr. 1978, UK, vol. 48, No. 4, pp. 189-197, ISSN: 0033-7722.
Zierhofer, C., Adaptive Sigma-Delta Modulation with One-bit Quantizatioon, Member, IEEE.
International Search Report of Dec. 12, 2002.

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