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:
Sep. 01, 2020
Filed:
Oct. 01, 2018
Applicant:
Keithley Instruments, Llc, Solon, OH (US);
Inventors:
James A. Niemann, Chagrin Falls, OH (US);
Wayne C. Goeke, Hudson, OH (US);
Assignee:
Keithley Instruments, LLC, Solon, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); G01R 15/00 (2006.01); G01R 19/00 (2006.01);
U.S. Cl.
CPC ...
H03F 3/45475 (2013.01); G01R 15/00 (2013.01); G01R 19/0092 (2013.01); H03F 2200/129 (2013.01); H03F 2200/36 (2013.01); H03F 2203/45116 (2013.01); H03F 2203/45594 (2013.01);
Abstract
A test and measurement device including a source configured to output a source signal, a source output configured to output the source signal to a connected cable, a guard drive circuit electrically coupled to the source and configured to receive the source signal and generated a guard drive signal, the guard drive circuit having a gain less than one, and a guard drive circuit output configured to output the guard drive signal to a connected guard.