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:
Dec. 01, 1987
Filed:
Oct. 15, 1985
Masakazu Ando, Gyoda, JP;
Advantest Corporation, Tokyo, JP;
Abstract
A test pattern is supplied to the IC under test and a current corresponding to the power supply current of the IC is obtained from a current converter. A reference current reverse in polarity from the output current of the current converter is yielded from a reference current source. The output currents of the current converter and the reference current source are supplied to an integrating capacitor via first and second switches, respectively. The first and second switches are simultaneously turned ON in synchronism with the test pattern and held in the ON state in a specified phase for a specified period in one operation cycle. The voltage of the integrating capacitor immediately after turning-OFF of the first and second switches is compared with a reference voltage and the comparison result is output. After the outputting of the comparison result and before the turning-ON of the first and second switches the voltage of the integrating capacitor is reset by reset means to the reference voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile