Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2009-02-05
2010-06-29
Mai, Lam T (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
Reexamination Certificate
active
07746257
ABSTRACT:
A delta-sigma analog-to-digital converter (ADC) circuit improves performance by reducing the amount of noise and other error sampled by the reference switching circuit. The reference switching network is operated intermittently only when the charge on an input integrator exceeds a threshold, thereby preventing the input integrator from saturating, while avoiding needlessly injecting reference noise. The input to the ADC may be a current injected directly into a summing node of the integrator, or may be a voltage supplied through another switching network.
REFERENCES:
patent: 4227185 (1980-10-01), Kronlage
patent: 4495591 (1985-01-01), Loomis, Jr.
patent: 4599573 (1986-07-01), Senderowicz
patent: 4887085 (1989-12-01), Moyal
patent: 4896155 (1990-01-01), Craiglow
patent: 4940981 (1990-07-01), Naylor et al.
patent: 4972189 (1990-11-01), Polito et al.
patent: 4972436 (1990-11-01), Halim et al.
patent: 4999632 (1991-03-01), Parks
patent: 5010347 (1991-04-01), Yukawa
patent: 5012178 (1991-04-01), Weiss et al.
patent: 5068659 (1991-11-01), Sakaguchi
patent: 5079550 (1992-01-01), Sooch et al.
patent: 5084702 (1992-01-01), Ribner
patent: 5101206 (1992-03-01), Riedel
patent: 5159341 (1992-10-01), McCartney et al.
patent: 5162801 (1992-11-01), Powell et al.
patent: 5257026 (1993-10-01), Thompson et al.
patent: 5274375 (1993-12-01), Thompson
patent: 5351050 (1994-09-01), Thompson et al.
patent: 5528239 (1996-06-01), Swanson et al.
patent: 5621406 (1997-04-01), Goetzinger et al.
patent: 6061009 (2000-05-01), Krone et al.
patent: 6064326 (2000-05-01), Krone et al.
patent: 6157331 (2000-12-01), Liu et al.
patent: 6975103 (2005-12-01), Blom
patent: 7129875 (2006-10-01), Altun et al.
patent: 7352166 (2008-04-01), Blom
Yang, et al., “On-Line Adaptive Digital Correction of Dual-Quantisation Delta-Sigma Modulators”, IET Electronics Letters, vol. 28, No. 16, pp. 1511-1513, Jul. 30, 1992, UK.
CS5542 Datasheet, Cirrus Logic, Sep. 1996, US.
CS5394 Datasheet, Cirrus Logic, May 1998, US.
Paulos et al, “Improved Signal-to-Noise Ratio Using Tri-Level Delta-Sigma Modulation”, IEEE Proc. ISCAS, May 1987, p. 463-466.
Adams et al, “Design and Implementation of an Audio 18-Bit Analog-to-Digital Converter Using Oversampling Techniques”, Audio Eng. Soc., vol. 34, p. 156-266, Mar. 1986.
Hauser et al., “Circuit and Technology Considerations for MOS Delta-Sigma A/D Converters”, IEEE Proc. ISCAS 86, p. 1310-1315, May 1986.
Larson et al., “Multibit Oversampled .SIGMA.-.DELTA. A/D Converter with Digital Error Correction”, Electron. Lett., vol. 24, p. 1041-1052, Aug. 1998.
Carley, “A Noise-Shaping Coder Topology for 15+ Bit Converters”, IEEE J. Solid-State Circuits, vol. SC-24, p. 267-273, Apr. 1989.
Abdennadher, et al., “Adaptive Self calibrating Delta-Sigma Modulators”, Electronics Letters, Jul. 2, 1992, vol. 28, No. 14.
Yang et al., “On-Line Adaptive Digital Correction of Dual-Quantisation Delta-Sigma Modulators”, Electronics Letters, Jul. 30, 1992, vol. 28, No. 16.
Melanson John L.
Schneider Edmund M.
Swanson Eric J.
Cirrus Logic Inc.
Harris Andrew M.
Mai Lam T
Mitch Harris Atty at Law, LLC
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