摘要:
Disclosed is a method, implemented in a related supply unit, for generating a supply voltage for electronic appliances of digital communications that allows to dampen noise in the communication bandwidth by reducing the frequency of switching noise when the number of active phone lines connected to the supply unit increases, senses which phone lines are active and, at each switching cycle, allows that a certain amount of electric energy is absorbed by one active line at the time. The method is implemented in a related supply unit.
摘要:
The present invention concerns an electrical power supply method for a cable telecommunication network, this method employing a first capacitor (C1) and a second capacitor (C2), this second capacitor (C2) being adapted to supply power to at least one element of this telecommunication network. In accordance with the invention, this method is characterized in that it comprises the following steps: - the step of forming, in a first operating configuration, a circuit for charging the first capacitor (C1) with a supply voltage (-VBat) and a circuit for discharging the second capacitor (C2) including the element to be supplied with power, - the step of forming, in a second operating configuration, a circuit for charging the second capacitor (C2), including the charged first capacitor (C1), and having between its terminals a voltage difference of the order of the supply voltage (-Vbat), and - the step of alternating these first and second operating configurations.
摘要:
Ce dispositif de protection (PD1) permet à une charge (L) de supporter une défaillance transitoire d'alimentation, II comporte: des entrées connectées à au moins une source d'alimentation éledrique (B1, B2), des sorties connectées à cette charge (L); et au moins deux condensateurs de stockage (SC1, SC2) et des moyens de commutation (D1, ..., D4, SW1, SW2, SW3, CU) tels que ces deux condensateurs de stockage sont :
reliés en parallèle à au moins une source d'alimentation (B1, B2) quand la tension fournie par au moins une source d'alimentation est supérieure à une valeur fixée; isolés de chaque source d'alimentation (B1, B2) et sont renées en série sur les sorties du dispositif (PD1) quand la tension fournie par chaque source d'alimentation est inférieure ou égaie à cette valeur fixée.
Application aux équipements électroniques notamment de télécommunication lorsque le respect des spécifications NEBS ou ATCA est demandé.
摘要:
The present invention is related to a method for remote line powering in a telecommunication network comprising the steps of - feeding along each line pair in a plurality of line pairs that are adapted for use in said telecommunication network direct current I at an input voltage having a value within the range from V?A#191 to V?B#191, thereby supplying electric power via said plurality of line pairs, - aggregating the electric power supplied via said plurality of line pairs to provide a supply voltage V?out1#191 suitable for powering an appliance, characterised in that before the step of feeding it comprises the steps of - detecting at the line pairs side, where power is injected, whether said electric power exceeds a predetermined threshold, and - if required, limiting said electric power supplied via each line pair of said plurality of line pairs.
摘要:
The invention relates to a system for the remote powering of at least one data-processing device (T) with determined power intensity and voltage operating ranges by means of a medium (8) for communication with a telecommunication network (6). The inventive system comprises an element (2) which transmits an information signal and an electric power signal to the at least one processing device (T), said power signal having a voltage and/or intensity greater than the maximum power intensity and/or voltage of said at least one processing device (T). The system further comprises a converter (18) with wide intensity and/or voltage input ranges, which is designed to receive the aforementioned electric power signal as input and to supply power having a voltage and intensity within the determined operating ranges of the at least one processing device (T, TIP, MHD). The invention also relates to the corresponding connection and conversion device.
摘要:
An analog/digital integrated subscriber circuit includes a power supply part supplying power with respect to a subscriber line, and a signal processing part carrying out a signal processing. The power supply part is provided with a D.C./D.C. converter which controls an ON-time of a switching by detecting an output voltage and an output current supplied to the subscriber line. The D.C./D.C. converter includes a switching mechanism for switching a power supply characteristic of the power supply part to a constant current characteristic up to a maximum output voltage when supplying the power with respect to a digital subscriber line and to a constant voltage characteristic having a voltage lower than the maximum output voltage when supplying the power with respect to an analog subscriber line.
摘要:
A subscriber line interface circuit (32) provides regulated current to a telephone subscriber (14) in an improved manner by reducing the amount of power required to operate while maintaining a constant current source. The current to the telephone subscriber (14) flows through a switching transistor (92, Fig. 3), and inductive storage element (98, Fig. 3), sensing resistors (54, 56) and a hybrid transformer (38). The desired operating characteristic is obtained by cycling the switching transistor (92). The switching transistor (92) is cycled on at a preset interval causing the telephone subscriber current to flow from the switching transistor. The switching transistor is cycled off in response to an increase in the telephone subscriber current as sensed by the sensing resistors (54, 56) thereby causing the current to flow from the inductive storage element (38). A current sensor (60) coupled to the sensing resistors (54, 56) supplies a current level signal SUMSIG to the switch-mode current source (52) that includes the transistor (92)2 and the inductive storage element (38). Saturation of the transformer (38) is prevented by regulated opposing current supplied by a source (80) controlled by the SUMSIG signal.
摘要:
Die in der Teilnehmeranschlußschaltung (SLIC) angelegte Teilnehmerspeisespannung ist von der Länge der Teilnehmerleitung (TL) abhängig. Zur Rufsignalerzeugung wird eine Spannung mit der Polarität der Speisespannung (-UB) entgegengesetzter Polarität (+UZ) zugeschaltet. Damit die Rufsignalspannung unabhängig von der längenbedingten Höhe der Speisespannung ist, wird die zuzuschaltende Spannung (+UZ) mit Hilfe eines Schaltreglers (OP1, OP2, OP3) erzeugt, der eine konstante Differenzspannung aufrechterhält.