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:
Apr. 04, 1989
Filed:
Jan. 05, 1988
Hisashi Tamamura, Tokyo, JP;
Sony/Tektronix Corporation, Tokyo, JP;
Abstract
An electronic device measurement apparatus measures a characteristic of an electronic device under test (DUT) by applying a smoothly changing voltage from one terminal of a voltage supply to an ungrounded terminal of the DUT and detecting a current flowing through the DUT. The current flowing through the DUT does not include a looping error component. A current detection resistor is connected between another terminal of the voltage supply and a grounded terminal of the DUT. Since the voltage applied to the DUT is a sine squared wave voltage, the pure current flowing through the DUT is detected by detcting cosine-wave and sine-wave components from the ungrounded terminal of the DUT and obtaining the difference between the voltage across the current detection resistor and the cosine-wave and sine-wave components.