Communications device powered from host apparatus

H - Electricity – 02 – J

Patent

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Details

H02J 1/00 (2006.01) H02M 3/07 (2006.01) H02M 7/06 (2006.01) H04B 1/00 (2006.01) H04B 10/02 (2006.01) H04L 12/02 (2006.01) H04L 12/10 (2006.01)

Patent

CA 2519343

A communications device, such as a transceiver, is used with a fiber optic communication line, wherein the communications device is powered from a host device. A voltage supply circuit, which comprises a full wave bridge rectifier responsive to data and control signals from the host device, produces plus and minus rectified voltage signals. First and second voltage regulators are responsive to the rectified voltage signals to produce plus and minus regulated voltages, for example ~5 volts, which is sufficient to power the communications device. A charge circuit alternately transfers energy from the plus and minus voltage lines to ensure the presence of plus and minus voltage signals when only positive or negative signals are provided by the host device.

L'invention concerne une amélioration apportée à un dispositif de communications, tel qu'un émetteur-récepteur, utilisé au moyen d'une ligne de communication à fibres optiques, le dispositif de communications étant alimenté à partir d'un dispositif hôte. L'amélioration consiste en un circuit d'alimentation de tension comprenant un redresseur en pont à double alternance répondant aux données et signaux de commande provenant du dispositif hôte, aux fins de production de signaux de tension redressés supérieurs et inférieurs. Des premier et second régulateurs de tension répondent aux signaux de tension rectifiés afin de produire des tensions régulées supérieures et inférieures, par exemple <u>+</u>5 volts, suffisantes pour alimenter le dispositif de communications. Un circuit de charge transfère de manière alternative de l'énergie à partir des lignes de tension supérieures et inférieures, de manière à garantir la présence de signaux de tension supérieurs et inférieurs seulement quand des signaux positifs ou négatifs sont fournis par le dispositif hôte.

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