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:
Jul. 30, 2019
Filed:
Jul. 10, 2017
Nxp Usa, Inc., Austin, TX (US);
Didier Salle, Toulouse, FR;
Olivier Vincent Doare, La Salvetat St Gilles, FR;
Birama Goumballa, Larra, FR;
Cristian Pavao Moreira, Frouzins, FR;
NXP USA, Inc., Austin, TX (US);
Abstract
A digital synthesizer is described that comprises: a ramp generator configured to generate a signal of frequency control words, FCW, that describes a desired frequency modulated continuous wave; a digitally controlled oscillator, DCO configured to receive the FCW signal; a feedback loop; and a phase comparator coupled to the ramp generator and configured to compare a phase of the FCW output from the ramp generator and a signal fed back from the DCO via the feedback loop and output a N-bit oscillator control signal. The digital synthesizer comprises a gain circuit coupled to a multiplier located between the ramp generator and the DCO and configured to apply at least one gain from a plurality of selectable gains to the N-bit oscillator control signal that set a selectable loop gain of the digital synthesizer and thereby set a selectable loop bandwidth; and calculate and apply a gain offset dependent upon the selected gain that is adapted when the selected gain is changed.