Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Patent
1994-03-03
1995-07-04
Regan, Maura K.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
324519, 324537, 324679, G01R 2726
Patent
active
054303834
ABSTRACT:
An automated method of verifying the capacitance loads on signal pins of an integrated circuit test load board employs a tester operating with transmission line techniques. The tester signal first is disconnected from the load board; and the rise time of the reflected waveform is measured between the ten percent and ninety percent values. The tester signal then is connected to the load board; and once again, the rise time of the reflected waveform is measured between the ten percent and ninety percent values. These two rise time values then are employed to calculate the total amount of edge loading capacitance on the path between the tester and the load board.
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Ptak LaValle D.
Regan Maura K.
VLSI Technology Inc.
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