Power feed system for telephone and/or information technology te

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

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Details

363 49, 363 56, 379413, H02M 3335

Patent

active

051445441

ABSTRACT:
A power feed system for telephone and/or information technology terminals (1) is connected to a transmission and remote power feed link (4) of the terminal and comprises a switch mode power supply unit (7) connected to the wires of the link and a regulator (8) at the output of the switch mode power supply unit which supplies at least part of the power required by the terminal and which includes a circuit to ensure progressive starting of the switch mode power supply unit when the terminal is powered up via the link.

REFERENCES:
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patent: 3818306 (1974-06-01), Marini
patent: 4056689 (1977-11-01), Freimanis
patent: 4499532 (1985-02-01), Hudson et al.
patent: 4661896 (1987-04-01), Kobayashi et al.
patent: 4679132 (1987-07-01), Jirka
patent: 4697229 (1987-09-01), Davy et al.
patent: 4704670 (1987-11-01), Gradl et al.
patent: 4761812 (1988-08-01), Hollis et al.
patent: 4813066 (1989-03-01), Holtz et al.

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