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:
Mar. 03, 1998
Filed:
Dec. 02, 1996
Applicant:
Inventor:
Chun-Ye Susan Chang, Boca Raton, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03D / ; H04L / ;
U.S. Cl.
CPC ...
329302 ; 329303 ; 375325 ; 375328 ; 375335 ;
Abstract
A receiver (100) is utilized for demodulating a multi-level frequency shift keyed (FSK) signal. The receiver (100) includes a mixer (102) for mixing the multi-level FSK signal to generate an in-phase signal and a quadrature signal, and a demodulator circuit (110) coupled to the mixer (102). The demodulator circuit (110) is adapted to count a sequence of state transitions of the in-phase signal and the quadrature signal and to determine a frequency deviation of the multi-level FSK signal based on the sequence of state transitions counted.