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:
Apr. 24, 1984
Filed:
May. 29, 1981
Applicant:
Inventor:
Carl R Ryan, Gilbert, AZ (US);
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
329 50 ; 329124 ; 375 90 ; 375120 ;
Abstract
An SMSK or MSK demodulator utilizing a Costas type closed loop wherein the voltage controlled oscillator is offset from the apparent carrier frequency of the SMSK or MSK signals so that the in-phase arm of the loop provides data at the output and the quadrature arm of the loop provides an indication that the loop is locked and, in combination with the data output, provides a control signal for the VCO which maintains the loop locked.