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:
Mar. 20, 1984
Filed:
May. 13, 1981
Applicant:
Inventors:
Robert A White, Shepperton, GB;
Ralph W Yell, Hampton, GB;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364721 ; 364718 ;
Abstract
The invention facilitates the calibration of VOR equipment by synthesis of series of waveforms representative of different positions in azimuth. Digital data representative of a frequency modulated component of the VOR waveform is stored in a first memory area (1) and digital data representative of an added sine wave component of the waveform is stored in a second memory area (2). By appropriate cyclic data retrieval from the memory areas and combination of the data (7) together with digital to analogue conversion (8) and filtering (10) the VOR waveform corresponding to a particular azimuth may be synthesized.