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:
May. 09, 1978
Filed:
Jan. 18, 1977
Applicant:
Inventor:
Paul W Osborne, Neptune, NJ (US);
Assignee:
Osborne-Hoffman, Inc., Point Pleasant Beach, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06G / ;
U.S. Cl.
CPC ...
328144 ; 328147 ; 328160 ;
Abstract
A correlation detector for detecting the presence of tones uses an improved circuit for finding the square root of the sum of the squares consisting of a two phase to multiphase converter and a magnitude comparator. The frequency response is extended to DC frequency. An improved multiplier is also described which results in very small DC offsets and provides for cancellation of whatever small DC offset which may be generated. Use of the improvements results in a monolithically integrable correlation detector.