The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 2010
Filed:
Mar. 20, 2006
Ben Gelissen, Nijmegen, NL;
Hendrik Van Der Ploeg, Waalre, NL;
Ben Gelissen, Nijmegen, NL;
Hendrik Van Der Ploeg, Waalre, NL;
NXP B.V., Eindhoven, NL;
Abstract
A flash analog-to-digital converter comprising a resistive reference ladder, a set of comparators for comparing the analog input signal with the reference voltages of the ladder to provide a digital code representing a coarse quantization of the input signal, a set of switches connected to the reference ladder and controlled by said digital code to provide an analog representation of the coarse quantization of the input signal, means to derive from said analog representation of the coarse quantization and from the input signal one or more residue signals and a fine analog-to-digital converter stage to generate a digital code representing a fine quantization of the one or more residue signals. For minimizing the number of switches required, each selector for one residue signal selects voltages of one half of the ladder at two values of the coarse quantization and the output signals of the two selectors for that residue signal are reversed by a crossover switch when the coarse quantization passes its center value.
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