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:
Aug. 16, 2005
Filed:
Oct. 17, 2003
Applicants:
Jonggook Kim, San Jose, CA (US);
Yun Liu, Sunnyvale, CA (US);
Joseph A. DE Santis, San Jose, CA (US);
Inventors:
Jonggook Kim, San Jose, CA (US);
Yun Liu, Sunnyvale, CA (US);
Joseph A. De Santis, San Jose, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R027/28 ; H01L029/72 ;
U.S. Cl.
CPC ...
Abstract
A method for quantifying safe operating regions within a safe operating area (SOA) for a bipolar junction transistor (BJT) by driving the device under test (DUT) as part of a current mirror circuit and monitoring variances in the current mirror ratio for various biasing conditions.