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. 08, 2003
Filed:
Feb. 04, 2002
Shigeru Sugamori, Santa Clara, CA (US);
Advantest Corp., Tokyo, JP;
Abstract
A power source current measurement unit provided in a semiconductor test system measures a power source current of a device under test with high speed and accuracy. The power source measurement unit includes a DA converter for generating a source voltage, an operational amplifier for supplying a power source current to the device under test, a voltage amplifier for amplifying a voltage representing the amount of power source current supplied to the device under test, an integration circuit for accumulating an output signal of the voltage amplifier for a predetermined integration time, and an AD converter for converting an output signal of the integration circuit to a digital signal after the integration time.