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. 18, 1991
Filed:
Jul. 17, 1989
Applicant:
Inventor:
Arthur F Hogrefe, Laurel, MD (US);
Assignee:
The Johns Hopkins University, Baltimore, MD (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375 41 ; 375 94 ;
Abstract
A 'pulse to zero' modulation scheme is taught to transmit binary information by modulating a bit mark onto a carrier at the start of each '0' in the bit stream. The 'pulse to zero' decoder produces an output that switches to '0' at the occurrence of the detected bit mark and resets to '1' if a second bit mark has not occurred within a preset time lapse from the previously detected bit mark.