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:
Jul. 29, 1986
Filed:
Dec. 10, 1984
Applicant:
Inventor:
Rodney J Lawton, Wiltshire, GB;
Assignee:
Plessey Overseas Limited, Ilford, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
329145 ; 329137 ; 455214 ;
Abstract
An FM detector comprises a frequency divider arranged to frequency divide an input FM signal and a phase sensitive detector coupled to the frequency divider. The detector receives a first frequency divided signal from a first path and receives a second frequency divided signal from a second path. The second path has a phase shift means located therein which is operative to shift the phase of the second frequency divided signal, in dependence on its frequency, relative to the phase of the first frequency divided signal. The phase sensitive detector provides an output signal corresponding to the modulation carried by the input signal.