Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Bus or line termination
Patent
1997-11-12
1999-06-08
Santamauro, Jon
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Bus or line termination
375257, H03K 1716
Patent
active
059107316
ABSTRACT:
An automatic impedance matching front end interface circuit includes a processor and a plurality of variable resistors, the resistances of which are adjustable by the processor to achieve impedance matching such that the upstream and downstream signals flow in desired directions. A method of adjusting the resistances of the variable resistors includes measuring two voltages at different locations along a downstream transmission line, obtaining a measured voltage ratio, comparing the measured ratio to an optimal ratio, and adjusting the resistances of the variable resistors to cause the measured ratio to approach the optimal ratio.
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Harman et al., "Local Distribution for IMTV," IEEE Multimedia, vol. 2, No. 3, IEEE Computer Society, Fall 1995, pp. 14-22.
"LUCV5002 Dual Video Operational Amplifier," Preliminary Data Sheet, Lucent Technologies, Jan. 1997, pp. 1-20.
"LUCV5006 Dual Video Operational Amplifier," Preliminary Data Sheet, Lucent Technologies, Jan. 1997, pp. 1-20.
Alcatel USA Sourcing L.P.
Le Don Phu
Santamauro Jon
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