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:
Aug. 19, 2014
Filed:
Jan. 10, 2012
Fractional phase locked loop having an exact output frequency and phase and method of using the same
Applicants:
Mark Cloutier, Gatineau, CA;
Gord Allan, Ottawa, CA;
Tudor Lipan, Ottawa, CA;
Inventors:
Assignee:
Hittite Microwave Corporation, Chelmsford, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fractional-N frequency synthesizer having an exact output frequency and phase includes a phase locked loop including a phase detector responsive to a reference signal and a fractional divider. The phase locked loop has an output signal whose frequency is a fractional multiple of the input reference signal. The synthesizer also includes a modulator having a modulus for providing an output to the fractional divider, in which the modulus multiplied by the ratio of the frequency of the output signal to the frequency of the reference signal is a non-integer number.