Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2008-01-08
2008-01-08
Hollington, Jermele (Department: 2829)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
Reexamination Certificate
active
07317324
ABSTRACT:
A plurality of resistors is connected to a plurality of output terminals of a semiconductor integrated circuit, respectively, and a predetermined voltage is applied to the plurality of resistors. Also, a predetermined operation pattern signal used to test functions of the semiconductor integrated circuit is input to a plurality of input terminals of the semiconductor integrated circuit. Thus, a total sum of amounts of currents caused to flow through the plurality of resistors, respectively, is measured. The total sum of amounts of currents thus measured is compared with a normal value of a total sum of amounts of currents which are measured in a non-defective sample which is used instead of the semiconductor integrated circuit and is verified in advance to normally operate. It is judged based on the comparison results whether or not the semiconductor integrated circuit is normal. As a result, whether or not the semiconductor integrated circuit is a non-defective or a defective can be simply judged without performing logic simulation and failure simulation.
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Ikeda Tatsuji
Takahashi Kazuya
Watanabe Hiroshi
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Hollington Jermele
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