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. 23, 1985
Filed:
Aug. 12, 1983
Applicant:
Inventor:
Robert A Maher, Carrollton, TX (US);
Assignee:
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H03L / ;
U.S. Cl.
CPC ...
455265 ; 455260 ; 331 19 ; 331 25 ;
Abstract
A channelized radio has a phase-lock loop which locks to any one of a pluity of carrier frequencies. These frequencies are harmonics of a reference signal. A harmonic identification circuit is disclosed which produces harmonics of a reference signal which is slightly offset from the original reference signal. The offset harmonic which is closest to the locked frequency is compared with the locked frequency and a difference measurement is produced. This difference measurement identifies the locked frequency and enables the operator to lock to a new frequency if desired.