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:
Apr. 06, 2021
Filed:
Jul. 31, 2018
Ams Ag, Premstaetten, AT;
Jia Sheng Chen, Premstaetten, AT;
Gregor Schatzberger, Premstaetten, AT;
AMS AG, Premstaetten, AT;
Abstract
A phase-locked loop circuit comprises an oscillator having a plurality of operating curves and being suitable for generating an output signal. In a calibration state the oscillator is trimmed to an operating curve for use in a normal operation state. The phase-locked loop circuit further comprises a phase/frequency detector being suitable for generating at least one error signal based on an input signal and a feedback signal generated on the basis of the output signal. The phase-locked loop circuit further comprises a loop filter being suitable for generating a loop-filter signal based on the at least one error signal, the loop-filter signal being applied to the oscillator in the normal operation state. The phase-locked loop circuit further comprises a calibration circuit being suitable for trimming the oscillator to the operating curve for use in the normal operation state on the basis of the at least one error signal.