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. 10, 2002
Filed:
May. 01, 2002
Takato Inoue, Hyogo, JP;
Masatoshi Maga, Tokyo, JP;
Hisayoshi Hanai, Tokyo, JP;
Shinji Yamada, Hyogo, JP;
Other;
Abstract
A memory tester including an algorithmic pattern generator (ALPG) for generating a test pattern as a digital signal based on vector data is provided with a digital-to-analog converter built in the memory tester or provided outside the memory tester. Thus, the function of a device under test (DUT) having the analog-to-digital converting function can be verified. In other words, an address signal included in the test pattern generated in the ALPG is used for generating an analog signal to be input to the DUT having the analog-to-digital converting function, not for address designation. A control unit compares an output digital signal generated in the DUT with the address signal generated in the ALPG as a test digital signal to detect the degree of agreement between these signals, thereby verifying the analog-to-digital converting function of the DUT. Consequently, a test system and a testing method capable of testing the analog-to-digital or digital-to-analog converting function of the DUT using the memory tester are obtained.