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:
Aug. 10, 1982
Filed:
Nov. 07, 1980
Applicant:
Inventor:
Carl R Ryan, Gilbert, AZ (US);
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375110 ; 375119 ; 328 63 ; 328155 ;
Abstract
A stream of demodulated data is converted to unidirectional pulses, multiplied by two clock reference signals separated by 90 degrees to form two products, which products are low pass filtered and cross multiplied by the same two clock reference signals, and the products produced are summed together to provide a clock reference which is in-phase with the switching times of the data pulses. The in-phase clock pulses operate a sampling circuit to sample the data at each switching point.