Terminating resistor device and a method for testing a...

Details Terminating resistor device and a method for testing a... Terminating resistor device and a method for testing a...

2006-05-02

2006-05-02

Chang, Daniel (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S016000

Reexamination Certificate

active

07038485

ABSTRACT:
An object of the present invention is to provide a terminating resistor device and a testing method, by which the resistance value of a terminating resistor circuit can be test effectively. The test procedure starts with setting a MUXSCANFF circuit which functions as a selecting circuit in scan mode for test. Then, input a test signal to the scan input and/or clock input. Thereby, a particular resistor element for one bit only is set ON. By detecting the resistance value of this resistor element that has been set ON, it is test whether the one-bit resistance element conforms to manufacturing specification. Select another one of the one-bit resistor elements in order and test each one-bit resistor element, thereby testing all resistor elements.

REFERENCES:
patent: 5254883 (1993-10-01), Horowitz et al.
patent: 5444404 (1995-08-01), Ebzery
patent: 5621335 (1997-04-01), Andresen
patent: 6389566 (2002-05-01), Wagner et al.
patent: 6535945 (2003-03-01), Tobin et al.
patent: 8-162930 (1996-06-01), None
patent: 10-198473 (1998-07-01), None

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