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:
Nov. 28, 2017
Filed:
Aug. 22, 2011
Applicant:
Gregory Sobolewski, Brecksville, OH (US);
Inventor:
Gregory Sobolewski, Brecksville, OH (US);
Assignee:
Keithley Instruments, LLC, Solon, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/02 (2006.01);
U.S. Cl.
CPC ...
G01R 27/02 (2013.01); G01R 27/025 (2013.01);
Abstract
A method for measuring the impedance of a DUT having a capacitance of less than 1 pF includes applying a voltage or current signal to the DUT, the voltage or current signal including an AC component having a non-zero frequency of less than 1 kHz; monitoring a current or voltage signal, respectively, through the DUT in response to the voltage or current signal; digitizing the voltage signal and the current signal synchronously; and calculating the impedance from the digitized voltage and current signals.