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:
Jan. 18, 2000
Filed:
Jun. 13, 1997
Takeo Miura, Tatebayashi, JP;
Advantest Corporation, Tokyo, JP;
Abstract
A strobe generator includes four strobe pulse generators generating original strobe pulses having the same frequency, respectively, and correspondingly, four logical comparator circuits, the number of which is identical to that of the strobe pulse generators. Further, a mode selection circuit is provided which can set any one of mode 1, mode 2 and mode 3. In mode 1, an output signal V from a level comparator is latched by a new high speed strobe signal having a frequency four times the frequency of the original strobe pulse, and the latched signals are sequentially compared with expected value data signals. In mode 2, an output signal V from the level comparator is latched by two new high speed strobe signals having a frequency two times the frequency of the original strobe pulse, and the latched signals are sequentially compared with the expected value data signals. In mode 3, an output signal V from the level comparator is latched by four new strobe signals having the same frequency as the frequency of the original strobe pulse and different phases from one another, and the latched signals are sequentially compared with the expected value data signals.
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