Continuous time fourth order delta sigma analog-to-digital...

Details Continuous time fourth order delta sigma analog-to-digital... Continuous time fourth order delta sigma analog-to-digital...

2005-08-16

2005-08-16

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

Reexamination Certificate

active

06930624

ABSTRACT:
A fourth order delta sigma analog-to-digital converter is presented, comprising a passive delta sigma modulator including a passive filter, a quantizer, and a digital-to-analog converter in a first feedback loop, and an active filter having a large gain factor in a second feedback loop around the passive delta-sigma modulator.

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White et al., Integrated fourth-order Sigma-Delta convertor with stable self-suning continuous time noise shaper, IEE Proceedings on Circuit, Devices & Systems, vol. 141, No. 3 Jun. 1994, pp. 145-150.
Schreier et al., Delta-Sigma Modulators Employing Continuous-Time Circuitry, IEEE Transactions on Circuits and Systems-I: Fundamental Theory and Applications, vol. 43, No. 4, Apr. 1996, pp. 324-332.
Benabes et al. Passive Sigma-Delta converters design, IEEE Instrumentation and Measuremnt Technology Conference, May 21-23, 2002, pp. 469-474.
Institute of Electrical and Electronics Engineers, 2002 Digest of Technical Papers and Visuals Supplement 2002 to the Digest of Technical Papers, IEEE International Solid-State Circuits conference, vol. Forty-Five, ISSN 0193-6530, 13.3 “A Dual-Mode 80MHz Bandpass ΔΣ Modulator for a GSM/WCDMA IF-Receiver” T. Salo, T. Hollman, S. Lingfors and K. Halonen, 7 pgs.

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