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:
Jul. 09, 2002
Filed:
Jul. 09, 1999
Applicant:
Inventors:
Assignee:
Leuze lumiflex GmbH & Co., Fürstenfeldbruck, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/128 ;
U.S. Cl.
CPC ...
G01R 3/128 ;
Abstract
A circuit arrangement for testing of a tristate detection circuit has controllable switches ( ) which simulate the three states: logical “1”, logical “0”, and high-impedance on a terminal (K ). Inputs (P , P ) from comparators ( ) of the detection circuit are set to supply voltage or to ground. Switching of the comparators ( ) on and off is checked independently of the state on the terminal (K ).