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:
Oct. 01, 2002
Filed:
Feb. 05, 2001
Applicant:
Inventor:
Shahriar Emami, Sunrise, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/00 ; H04L 2/714 ;
U.S. Cl.
CPC ...
H03D 3/00 ; H04L 2/714 ;
Abstract
An FM demodulator in accordance with the present invention receives a composite signal from an antenna and corresponding processing circuitry. The composite signal includes a carrier signal having a voice/data signal modulated thereon. The composite signal is processed to separate the voice/data signal from the carrier signal. The voice/data signal is separated into an in-phase (I) signal and a quadrature (Q) signal. The Q signal is differentiated and then divided by the I signal to obtain the voice/data signal. Alternatively, I signal is differentiated and then divided by the Q signal to obtain the voice/data signal.