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. 06, 2016
Filed:
Feb. 19, 2016
Microsemi Soc Corporation, San Jose, CA (US);
Prakash Reddy, Hyderabad, IN;
Microsemi SoC Corporation, San Jose, CA (US);
Abstract
A digital phased lock loop includes a digital controlled oscillator configured to produce an output signal at a frequency. A phase comparator compares the output signal, or a signal derived therefrom, with a reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator from an output of the phase comparator. A frequency error measuring circuit coupled to the output of the phase comparator produces a frequency error signal. A second loop filter produces a second control signal for the digital controlled oscillator from an output of the frequency error measuring circuit. A circuit combines the first and second control signals and provides the combined control signals to the digital controlled oscillator.