ΔΣ analog to digital converter system with...

Details ΔΣ analog to digital converter system with... ΔΣ analog to digital converter system with...

2006-08-02

2008-10-21

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000

Reexamination Certificate

active

07439890

ABSTRACT:
An improved ΔΣ analog to digital converter system with automatic gain control response to out-of-band interferers including a ΔΣ multibit analog to digital converter responsive to an analog input for providing a digital output including the in-band signal and out-of-band interferers and quantization noise and a signal peak estimator circuit responsive to the out-of-band interferers for generating a gain control signal for adjusting the gain of a variable gain element which may be an independent element such as a variable gain amplifier or it may be the analog to digital converter itself by virtue of its having an adjustable full-scale.

REFERENCES:
patent: 5905453 (1999-05-01), Kase
patent: 6445320 (2002-09-01), Noro et al.
patent: 6968166 (2005-11-01), Yang
Dorrer et al., A 3mW 74-db SNR 2-MHz Continuous-Time Delta-Sigma ADC with a Tracking ADC Quantizer in 0.13-μm CMOS, IEEE Journal of Solid-State Circuits, vol. 40, No. 12 Dec. 2005, pp. 2416-2427.
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, Mar. 1990, pp. 309-318.
Richard Schreier, Delta Sigma Toolbox, Version 5.2, Jun. 7, 2000, pp. 1-25.

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