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. 19, 1985
Filed:
Dec. 15, 1981
Applicant:
Inventor:
William H Childs, Gaithersburg, MD (US);
Assignee:
Communications Satellite Corporation, Washington, DC (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03C / ; H04L / ;
U.S. Cl.
CPC ...
332 / ; 332 / ; 332 22 ; 332 / ; 375 47 ; 375 50 ; 375 64 ;
Abstract
An MSK modulator having a simple construction with only a single necessary adjustment. The digital bit stream to be modulated is fed directly to the control input of a 0,.pi. phase shifter in a single-sideband modulator. A phase shift circuit is used to couple an IF signal to the IF signal input of the single-sideband modulator with the phase thereof adjusted by 0 or .pi. in response to two contiguous bits of the input data stream so as to maintain phase continuity in the output of the modulator for all possible bit combinations in the input stream.