Bitstream controlled reference signal generation for a...

Details Bitstream controlled reference signal generation for a... Bitstream controlled reference signal generation for a...

2008-06-24

2008-06-24

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07391351

ABSTRACT:
When a reference signal is generated for a digital-to-analog converter in the feedback path of a sigma-delta modulator, the reference signal can contain modulated error signals, for example when the reference generator implements dynamic element matching. By controlling the reference signal generation in dependence on the bitstream output from the sigma-delta modulator, the effects of intermodulation of the reference signal with the bitstream can be reduced.

REFERENCES:
patent: 6369733 (2002-04-01), Tucker et al.
patent: 6567025 (2003-05-01), Schreier et al.
Pertijs M A et al: “A Sigma-Delta Modulator With Bitstream-Controlled Dynamic Element Matching”; Solid-State Circuits Conf. 2004; ESSCIRC 2004; Proceeding of the 30thEuropean Leuven; Belgium Sep. 21-23, 2004; Piscataway NJ USA; IEEE US Sep. 21, 2004; pp. 187-190.
Bakker A Ed—Institute of Electrical and Electronics Engineers: “CMOS Smart Temperature Sensors—An Overview”; Proceedings of IEEE Sensors 2002 Orlando FL; Jun. 12-14, 2002; IEEE International Conf. on Sensor NY US.; vol. 1 of 2 Conf. 1 Jun. 12, 2002; pp. 1423-1427.

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