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:
Jun. 26, 1984
Filed:
Jul. 26, 1982
Thomas H Warner, Boston, MA (US);
Charles H Cox, III, Carlisle, MA (US);
Other;
Abstract
An I-V curve tracer measures an I-V relationship of an electrical device during transient conditions. In operation, the curve tracer couples across the device a fixed-value inductive or capacitive load. While the current and voltage flowing through the device approach steady-state levels, the voltage and current are sampled and stored in a memory upon predetermined incremental changes in one parameter of the device such as voltage. A digital representation of one parameter, such as voltage, constitutes a memory address and another parameter, such as current, is stored at that address in the memory. A data processor subsequently retrieves the memory data and addresses to display or plot the I-V relationship of the device. This parametric sampling technique assures that the measurements are coincident in occurrence with the sweeping of the I-V curve and eliminates the need for complex control and timing circuits.