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. 29, 2003
Filed:
Jul. 01, 2002
Applicant:
Inventors:
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ;
Abstract
A ring oscillator has a multiplicity of inverters. An interconnect is connected between two of the inverters, and a storage capacitor to be measured, with its associated lead resistor, is coupled to the interconnect either via an interconnect or a transistor can selectively coupled and decouple the capacitor and the lead resistance. A measuring device is connected up to the ring oscillator and is used to determine a value for the oscillation frequency of the ring oscillator on the basis of which a value for the time constant of the storage capacitor can be determined.