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:
Mar. 26, 2019
Filed:
Nov. 29, 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 an output signal frequency, and a phase comparator configured to compare the output signal or a signal derived from the output signal, with a reference signal at a reference signal frequency or a signal derived from the reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator. A frequency error measuring circuit produces a frequency error signal that directly represents a frequency difference between the output signal frequency and the reference signal frequency. 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 providing the combined control signals to the digital controlled oscillator.