Return-loss detection for serial digital source

Details Return-loss detection for serial digital source Return-loss detection for serial digital source

1994-08-22

1996-01-30

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

324725, 324603, 324534, 324646, 370 13, 370 28, 375224, G01R 1700

Patent

active

054883105

ABSTRACT:
A return-loss detector for a serial digital signal source uses a return-loss bridge circuit to exploit the broadband spectral characteristics of a serial digital signal from the signal source to monitor the termination conditions of a system being driven. A differential pair of serial digital signals from the source are input to the bridge circuit having a reference termination in one leg and the system termination in the other. A broadband detector is used at the output of the bridge circuit to generate an error signal, which is measured by a detector or metering circuit. The measured signal may be displayed as a value in dB or may be input to a comparator to provide an alarm or warning signal to an operator.

REFERENCES:
patent: 3244975 (1966-04-01), Bauer
patent: 3774107 (1973-11-01), Dunwoodie

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