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:
Oct. 29, 1991
Filed:
Jun. 02, 1989
Applicant:
Inventor:
Allen P Edwards, Palo Alto, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ;
U.S. Cl.
CPC ...
455 52 ; 455 65 ; 455304 ;
Abstract
In accordance with the teachings of this invention, a multi-path distortion simulator is constructed having two paths, one path including a delay means, and both paths including phase shifters and attenuators. The phase shifters are closely matched, thereby compensating for drift and errors in the phase shifters. Similarly, the attenuators are closely matched, thereby compensating for drift and errors in the attenuators.