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:
Feb. 02, 1982
Filed:
Dec. 26, 1979
Applicant:
Inventors:
Stanley W Attwood, Scottsdale, AZ (US);
James H Stilwell, Scottsdale, AZ (US);
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
329 50 ; 329104 ; 329124 ; 331 12 ; 375 86 ;
Abstract
A multiple phase shift keyed data coherent carrier recovery system wherein a coherent carrier tracking loop has attached thereto a signal generator for providing a signal with non-stationary zero-crossing times (e.g. a noise generator), which signal generator chops, or alters the phase of, signals within the loop to prevent the loop from locking on harmonics or subharmonics and to allow AC coupling with DC response therein.