Power supply circuit, telecommunication device and

专利名称：Power supply circuit, telecommunication

device and method for multiple DC slopepower management

发明人：Jacob Mulder,Fransiscus J. M. Thus,Eric C.

Labbe

申请号：US09077136申请日：19980521公开号：US06212411B1公开日：20010403

专利附图：

摘要：A power supply circuit includes a line voltage forming circuit and a supply

voltage forming circuit. The line voltage forming circuit forms a voltage that isproportional to a line voltage provided by a telecommunication line, and the supplyvoltage forming circuit forms a second voltage from the first voltage. A sensing circuitsenses the telecommunication line and provides a sensor signal that is representative ofthe power provided by the telecommunication line. The line voltage forming circuit iscontrolled by the sensor signal such that the slope of a load line characteristic of the linevoltage forming circuit is modified when the sensor signal is above a predeterminedthreshold signal. The load line characteristic defines an increase of the line voltage withan increase of the line current provided by the telecommunication line.

申请人：U.S. PHILIPS CORPORATION

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