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:
Nov. 23, 2004
Filed:
Feb. 10, 2003
Applicant:
Inventors:
Carl W. Moreland, Oak Ridge, NC (US);
Bryan S. Puckett, Stokesdale, NC (US);
Assignee:
Analog Devices, Inc., Norwood, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/00 ;
U.S. Cl.
CPC ...
H03L 7/00 ;
Abstract
Synthesizer structures and alignment methods are provided that facilitate quadrature demodulation. The structures are realized with phase-locked loops that include half-rate frequency dividers to provide loop output signals with a wide range of output frequencies and with frequency dividers that provide quadrature signals in response to the output signals. The structures include controllers that direct alignment methods which lock a VCO to a reference signal from a reference frequency divider to thereby provide the output signals.