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. 15, 1988
Filed:
Nov. 23, 1987
Applicant:
Inventors:
Mark Lucak, Saline, MI (US);
Michael Klein, Ann Arbor, MI (US);
Assignee:
Allen-Bradley Company, Inc., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
329126 ; 329110 ; 375 45 ; 375 88 ;
Abstract
A demodulator for a phase coherent frequency shift keyed signal has a master clock which generates a signal having a plurality of pulses during each half of the bit internal of the FSK signal. A detector determines during which master clock pulse within several groups of X number of pulses the most transitions occur in the received signal. Based on the determined clock pulse, samples taken in each of two consecutive half-bit intervals of the FSK signal are selected for comparison to produce the demodulator output signal.