Flash analog-to-digital converter

Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion

Reexamination Certificate

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Details

C341S155000

Reexamination Certificate

active

07605740

ABSTRACT:
A flash analog-to-digital converter comprises a resistive string powered by a reference voltage source for providing a set of equidistant reference voltages and a set of comparators for comparing the analog input signal with the reference voltages. A set of switches are arranged and controlled to perform an algorithm for mitigating the influence of mismatches between the components. The switches are arranged between the reference voltage source and the resistive string so that switches in the reference inputs to the comparators are avoided. The resistive string is preferably circular. The converter can handle differential signals.

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patent: 19528403 (1996-03-01), None
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Carbone, Paolo; et al “Stochastic-Flash Analog-To-Digital Conversion” IEEE Transactions on Instrumentation and Measurement, vol. 47, No. 1, Feb. 1998, pp. 65-68.
Choi, Michael; et al “A 6-B 1.3-Gsample/S A/D Converter in 0.35-UM CMOS” IEEE Journal of Solid-State Circuits, vol. 36, No. 12, Dec. 2001, pp. 1847-1858.
Radke, R. E; et al “A 14-Bit Current-Mode Sigma Delta DAC Based Upon Rotated Data Weighted Averaging” IEEE Journal of Solid-State Circuits, vol. 35, Issue 8, Aug. 2000, pp. 1074-1084.
Barkin, D. B; et al “A CMOS Oversampling Bandpass Cascaded D/A Converter With Digital FIR and Current-Mode SEMI Digital Filtering” IEEE Journal of Solid-State Circuits, vol. 39, Issue 4, April 2004, pp. 585-593.

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