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. 20, 2003
Filed:
Jan. 10, 2000
Applicant:
Inventors:
Raimund Pammer, Graz, AT;
Helmut Rieder, Graz, AT;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/006 ;
U.S. Cl.
CPC ...
H04B 1/006 ;
Abstract
A data receiver circuit for infrared signals, in particular for toll systems on roads, comprises several infrared detectors ( ) the signals of which are supplied to a summing circuit so as to increase the useful power while suppressing interfering signals. To improve the signal/noise ratio, it is provided that several input circuits are provided with an infrared detector ( to ) each and with an associated separate amplifier ( to ), and that these input circuits are connected in parallel to the summing circuit ( ).