07209725 is referenced by 53 patents and cites 210 patents.

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.

Title
Analog zero if FM decoder and embodiments thereof, such as the family radio service
Application Number
9/476092
Publication Number
7209725 (B1)
Application Date
January 3, 2000
Publication Date
April 24, 2007
Inventor
Gregory S Silver
St. Augustine
FL, US
Charley D Moses Jr
Jacksonville
FL, US
Richard C Looke
Jacksonville
FL, US
Joseph M Hamilla
St. Augustine
FL, US
Robert W Cook
Switzerland
FL, US
Charles D Clements
Jacksonville
FL, US
Michael J Bultman
Jacksonville
FL, US
David F Sorrells
Jacksonville
FL, US
Agent
Sterne Kessler Goldstein & Fox P L L C
Assignee
ParkerVision
FL, US
IPC
H03K 9/00
H04L 12/56
H04B 1/28
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