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:
Oct. 13, 2009
Filed:
Feb. 19, 2008
Jens Ullmann, San Jose, CA (US);
Jens Ullmann, San Jose, CA (US);
Qualitau, Inc., Sunnyvale, CA (US);
Abstract
An electronic device under test (DUT) may be incorporated into a circuit having a voltage limiter connected in parallel with the DUT. The circuit includes a controlled current source having an output current connected in series with the DUT. The voltage limiter is characterized in that, when the output current is such that the voltage across the DUT (Vdut) would exceed a particular maximum voltage Vmax, without the voltage limiter in place, at least a portion of the output current flows through the voltage limiter, so as to limit Vdut to be less than or equal to Vmax. When the output current is such that Vdut would be less than or equal to Vmax, current does not flow through the voltage limiter. The circuit may include a plurality of DUTs, each DUT connected in series with the output current of a controlled current source, with a voltage limiter connected in parallel with each DUT.