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:
May. 28, 1996
Filed:
Sep. 16, 1994
Applicant:
Inventor:
Christopher J Swanke, Cedar Rapids, IA (US);
Assignee:
Rockwell International, Seal Beach, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B / ;
U.S. Cl.
CPC ...
327107 ; 327551 ; 327105 ; 327113 ; 327106 ; 364721 ; 331 16 ;
Abstract
A synthesizer based upon direct-digital frequency synthesizer techniques of simplistic design and minimized spurious signal levels. The output signals of two frequency hopped direct-digital frequency synthesizers are combined with the resultant signal having a greatly suppressed spurious signal level due to the channel spacing variation of the spur. Alternate embodiments concern the number and functional location of digital-to-analog converters, varying the clock signal and the use of high-pass filters.