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:
Jun. 28, 1988
Filed:
Mar. 11, 1987
James D Joseph, Oakdale, MN (US);
Dennis D Ferguson, St. Paul, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A device for converting time varying signals which represent sin .theta. and cos .theta. of an angle .theta., where can take on values over a range, to an n bit digital signal. The range is typically 2.pi. radians and is segmented into 2.sup.n+1 -4 segments. The segments are mapped into 2.sup.n -1 amplitudes, and are encoded as the n bit digital signal. The invention is particularly useful as an angle digitizer where .theta. represents the phase difference between an input signal and a reference signal. As an angle digitizer, harmonic rejection is enhanced by the efficient use of the n bits to distinguish amplitude states as opposed to distinguishing merely phase states.