Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2005-01-07
2008-08-19
Nguyen, Ha Tran (Department: 2829)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
C324S1540PB
Reexamination Certificate
active
07414418
ABSTRACT:
A test system includes a communications channel that terminals in a probe, which contacts an input terminal of an electronic device to be tested. A resistor is connected between the communications channel near the probe and ground. The resistor reduces the input resistance of the terminal and thereby reduces the rise and fall times of the input terminal. The channel may be terminated in a branch having multiple paths in which each path is terminated with a probe for contacting a terminal on electronic devices to be tested. Isolation resistors are included in the branches to prevent a fault at one input terminal from propagating to the other input terminals. A shunt resistor is provided in each branch, which reduces the input resistance of the terminal and thereby reduces the rise and fall times of the input terminal. The shunt resistor may also be sized to reduce, minimize, or eliminate signal reflections back up the channel.
REFERENCES:
patent: 4392107 (1983-07-01), Gollomp
patent: 5172051 (1992-12-01), Zamborelli
patent: 5623214 (1997-04-01), Pasiecznik, Jr.
patent: 6362614 (2002-03-01), Draving
patent: 6784674 (2004-08-01), Miller
patent: 6798225 (2004-09-01), Miller
FormFactor Inc.
Hauser R. Scott
Isla-Rodas Richard
Kirton & McConkie
Nguyen Ha Tran
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