Method and apparatus for dynamically matching impedance

Details Method and apparatus for dynamically matching impedance Method and apparatus for dynamically matching impedance

2005-12-06

2005-12-06

Tran, Sinh (Department: 2644)

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

C379S403000

Reexamination Certificate

active

06973183

ABSTRACT:
In one aspect of the invention a communication device including circuitry operable to facilitate dynamic impedance matching includes an image impedance operable to be coupled to a receiver/transmitter pair associated with a line impedance. The device also includes matching circuitry coupled to the line impedance and the image impedance, the matching circuitry operable to measure an impedance mismatch between the line impedance and the image impedance and to generate a control signal based on the measured impedance mismatch. The image impedance is operable to be varied to more closely match the line impedance based at least in part on the control signal.

REFERENCES:
patent: 3982080 (1976-09-01), Ukeiley
patent: 4103118 (1978-07-01), Bergman
patent: 4757530 (1988-07-01), Arnon
patent: 5034978 (1991-07-01), Nguyen et al.

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