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. 24, 2007
Filed:
Jan. 03, 2000
David F. Sorrells, Jacksonville, FL (US);
Michael J. Bultman, Jacksonville, FL (US);
Charles D. Clements, Jacksonville, FL (US);
Robert W. Cook, Switzerland, FL (US);
Joseph M. Hamilla, St. Augustine, FL (US);
Richard C. Looke, Jacksonville, FL (US);
Charley D. Moses, Jr., Jacksonville, FL (US);
Gregory S. Silver, St. Augustine, FL (US);
David F. Sorrells, Jacksonville, FL (US);
Michael J. Bultman, Jacksonville, FL (US);
Charles D. Clements, Jacksonville, FL (US);
Robert W. Cook, Switzerland, FL (US);
Joseph M. Hamilla, St. Augustine, FL (US);
Richard C. Looke, Jacksonville, FL (US);
Charley D. Moses, Jr., Jacksonville, FL (US);
Gregory S. Silver, St. Augustine, FL (US);
ParkerVision, Inc, Jacksonville, FL (US);
Abstract
A method and system for directly down-converting FM signals to demodulated baseband information signals that can be used to directly down-convert analog FM signals and digital FM signals to demodulated baseband information signals. In an embodiment, the method includes aliasing an FM signal at an aliasing rate substantially equal to the frequency of the FM signal or substantially equal to a sub-harmonic thereof; adjusting the aliasing rate in accordance with frequency changes on the FM signal to maintain the aliasing rate substantially equal to the frequency of the FM signal, and outputting a demodulated baseband information signal. The method optionally includes compensating for phase delays and/or other characteristics of the loop in order to maintain bandwidth and stability for the loop.