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:
Nov. 15, 2022
Filed:
Jun. 24, 2021
Nxp B.v., Eindhoven, NL;
Robert Rutten, Nistelrode, NL;
Hendrik van der Ploeg, Waalre, NL;
Lucien Johannes Breems, Waalre, NL;
Martin Kessel, Bannewitz, DE;
Muhammed Bolatkale, Delft, NL;
Bernard Burdiek, Halstenbek, DE;
Manfred Zupke, Hamburg, DE;
Johannes Hubertus Antonius Brekelmans, Nederweert, NL;
Shagun Bajoria, Eindhoven, NL;
NXP B.V., Eindhoven, NL;
Abstract
A digital conversion system including a sigma-delta converter, a signal generator providing a substantially symmetrical injection signal that is injected into the sigma-delta converter conversion path, bandpass filters for filtering the injection signal and the output of the sigma-delta converter, a correlator that correlates the filtered signals for providing an error signal, and a loop controller that uses the error signal to adjust a resonant frequency of the sigma-delta converter to output a target notch frequency. The loop controller may adjust a resonant frequency of a loop filter of the sigma-delta converter, in which the bandpass filters may each be centered at the target notch frequency at the output of the sigma-delta converter. The correlator may include a complex conjugate block, a multiplier and a mean calculator. The loop controller may include a converter and an amplifier and an integrator or a least-mean square block.