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:
Dec. 24, 2013
Filed:
Oct. 29, 2009
Jean-michel Hode, St Cloud, FR;
Jean-Michel Hode, St Cloud, FR;
Thales, Neuilly sur Seine, FR;
Abstract
In a method for correcting amplitude and phase offsets in a sigma-delta modulator having a loop including an integrator with a filter and an amplifier, an analog-to-digital converter, a digital-to-analog converter, and an adder-subtractor, an open-loop amplitude/phase frequency response of the modulator is estimated digitally. A phase offset value and an amplitude offset value are calculated by comparing the estimated open-loop amplitude/phase response with a reference amplitude/phase frequency response. The phase and gain offsets of the loop are then compensated for according to the estimated offset values. A sigma-delta modulator implements the method.