Driving point reference plane time domain reflectometry method f

Details Driving point reference plane time domain reflectometry method f Driving point reference plane time domain reflectometry method f

1993-12-15

1996-03-12

Regan, Maura K.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

G01R 3108

Patent

active

054989655

ABSTRACT:
Method for determining the characteristic impedance of a transmission line on a printed wiring board using time domain reflectometry. The method involves selecting a driving point in time, selecting an undisturbed interval, measuring voltage at predetermined time intervals across the undisturbed interval, determining from the measured voltages a curve representative of such voltages, and determining the voltage on the representative curve at the driving point. The characteristic impedance of the transmission line under test, denoted by Z.sub.0, is obtained by using the "driving point" of the transmission line as the reference plane for the impedance measurements.

REFERENCES:
patent: 4739276 (1988-04-01), Graube
patent: 4887041 (1989-12-01), Mashikian et al.
patent: 4970466 (1990-04-01), Bolles et al.
patent: 5063353 (1991-11-01), Gubisch
patent: 5128619 (1992-07-01), Bjork et al.
Application Note 62: TDR Fundamentals, For Use With HP 54120T Digitizing Oscilloscope and TDR, Hewlett Packard, Apr. 1988.

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