Accumulator for adaptive sigma-delta modulation

Details Accumulator for adaptive sigma-delta modulation Accumulator for adaptive sigma-delta modulation

2008-03-04

2008-03-04

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000

Reexamination Certificate

active

11668620

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), Jensen et al.
patent: 3918042 (1975-11-01), 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: 4851841 (1989-07-01), Sooch
patent: 4937577 (1990-06-01), Rich et al.
patent: 4940977 (1990-07-01), Mandell
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: 6163288 (2000-12-01), Yoshizawa
patent: 6211805 (2001-04-01), Yu
patent: 6501329 (2002-12-01), Petrofsky et al.
patent: 6661363 (2003-12-01), Zierhofer
patent: 6784814 (2004-08-01), Nair et al.
patent: 6885326 (2005-04-01), Zierhofer
patent: 6943715 (2005-09-01), Radja et al.
patent: 7190295 (2007-03-01), Zierhofer
patent: WO 02/09292 (2002-01-01), None
Zierhofer, C., “Adaptive Sigma-Delta Modulation With One-Bit Quantization”, Member IEEE, IEEE Transactions on Circuits and Systems—II: Analog and Digital Signal Processing, vol. 47, No. 5, p. 408 (May 2000).
Zierhofer, C., “Numerical Adaptive Delta Modulation—A Technique for Digital Signal Representation in ASIC Applications”, Electrotechnical Conference, 1991 Proceedings, 6thMediterranean Ljubljana, Slovenia May 22-24, 1991, New York, NY, USA, IEEE#, US, May 22, 1991, pp. 331-334, XP010039836, ISBN: 0-87942-655-1 (May 1991).
Norsworthy, S., et al, “Delta-Sigma Data Converters: Theory, Design and Simulation”, IEEE Press, New York, NY, Table of Contents/Preface Only (1997).
Candy, J., et al, “Oversampling Delta-Sigma Data Converters: Theory, Design and Simulation”, IEEE Press, New York, NY, Table of Contents/Preface Only (1992), month unknown.
Sakane, F. T., et al., “Two-Bit Instantaneously Adaptive Delta Modulation for P.C.M. Encoding”, The Radio and Electronic Engineer, vol. 48, No. 4, pp. 187-197 (Apr. 1978).
Chakravarthy, C.V., “An Amplitude-Controlled Adaptive Delta Sigma Modulator”, The Radio and Electronic Engineer, vol. 49, No. 1, pp. 50-54 (Jan. 1979).
Jaggi, M.P., et al, “Instantaneously Adaptive Delta Sigma Modulator Modulateur Delta Sigma Instantanement Adaptatif”, vol. 11, No. 1, 4 Pages (1986), month unknown.

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