Abstract:
Telecommunication line circuit with line amplifiers having a bias voltage equal to the sum of a fixed voltage and a variable voltage which is function of the envelope of a metering signal. A polarity reversal circuit is able to change the output voltage of each of these line amplifiers between two predetermined voltages in a gradual way and independently from the line circuit.
Abstract:
High voltage electronic contacts (S, S') and associated devices including TRIMOS (MOS TRlacs) devices connected in anti-parallel fashion between two terminals (S1/S' S 2 /S' 1 ), Each electronic contact (S, S') is controlled via a control terminal (S 4 ) by two auxiliary electronic contacts (NA, NB) each able to establish a low or high impedance between the control terminal (S 4 ) and one of the two other terminals (S 1 / S' 2 , S 2 /S' 1 ), the impedance conditions of these auxiliary contacts (NA, NB) being opposed. A power protection circuit associated to the TRIMOS device allows the flow of a relatively high current through the electronic contacts (S, S') for the lower voltage range across it, and minimizes the power dissipation in the contacts in the higher voltage range, i.e. when abnormally high signals are applied to the contact.
Abstract translation:包括在两个端子之间以反并联方式连接的TRIMOS(MOS TRlacs)器件的高压电子触点(S,S min)和相关器件(S1 / S min 2,S2 / S min 1)。 每个电子触点(S,S min)通过控制端子(S4)由两个辅助电子触点(NA,NB)控制,每个辅助电子触点(NA,NB)能够在控制端子(S4)和另外两个之间建立低阻抗或高阻抗 端子(S1 / S min 2,S2 / S min 1),这些辅助触点(NA,NB)的阻抗条件相反。 与TRIMOS器件相关联的电源保护电路允许通过电子触点(S,S min)的相对较高的电流流过跨越其的较低电压范围,并且在更高电压范围内使触点中的功率消耗最小化,即 当异常高的信号被施加到触点时。
Abstract:
An arrangement for making a fluid-tight cable, as well as a method and a cable obtained thereby, includes a tubular injection device (21) through which passes a cable core (9) wrapped in a permeable tape. The device which has an adjustable chamber (W) disposed around the cable core is able to perform a reciprocating movement. During the forward stroke the device travels with the cable and a water blocking material is injected into the cable core to fill the interstices between the conductors thereof. During the backward stroke when the device returns to its initial position the injection is stopped and the material present in the chamber is smeared out over the tape.
Abstract:
Electrically conductive device constituted by a male connector (1) comprising two end flanges (4, 5) and an electrically conductive bottom part (3) holding a plurality of a male contacts which are adapted to cooperate with the female contacts (12) of a female connector (8). When these connectors are interconnected the female contacts are electrically interconnected and a gap (14) between the connectors (1, 8) permits cleaning of these contacts.
Abstract:
Pulse corrector, for a phase locked loop, with first (R) and second (V) outputs coupled with a digital phase detector (DPD) and with first (T) and second (S) inputs coupled with a reference source and with the output of a controlled oscillator (VCO) respectively. After the end of an interruption of the reference source, at the first input there is generated a pulse (TL) whose first edge never leads the corresponding first edge at the second output and whose duration is not substantially smaller than the duration of a pulse (S4) at the second input.
Abstract:
In a switching network with a plurality of inlets and outlets and a plurality of interconnected switching nodes having inputs and outputs with respective addresses, a method is described of modifying a first set of outlets to which a cell stream is routed from one of the inlets to a second set of outlets to which this cell stream is to be routed, the addresses of the outputs of each switching node from which the cell stream is output being stored in a routing table of the node. The method includes the steps of:
transmitting a modification request message to the inlets from each outlet belonging to one but not to both sets; in each switching node receiving the modification request message on one of its outputs, selectively transmitting the request message to the inlets or transmitting a confirmation message to the above each outlet depending on the absence or presence in the node routing table of addresses of node outputs other than the one node output, respectively.
Abstract:
Die Erfindung schlägt ein Untervermittlungssystem NSS für ein Mobilfunksystem MRS vor, bei dem ein Kommunikationsrechner COMP nach Eingang eines Rufes von einem rufenden Teilnehmer A und einem erfolglosem Vermittlungsversuch des Rufes eine Nachricht SM für den gerufenen Teilnehmer B erzeught und in einer Speichereinrichtung MEM Speichert. Ist der gerufene Teilnehmer B wieder erreichbar, sendet eine Dienstezentrale SMSC diese Nachricht an den gerufenen Teilnehmer aus. Die Nachricht SM enthält unter anderem die Teilnehmerkennung A-ID rufenden Teilnehmers A, um einen Rückruf einzuleiten.
Abstract:
The present invention relates to a current control interface circuit interfacing between a power supply source and a load impedance (ZL). The current control interface circuit includes a variable impedance device (VIL) controlling the current delivered by the power supply source to the load impedance. The resistance value of the variable impedance device is controlled by means of charging a capacitance (C) connected to a control terminal of the variable impedance device. According to the invention, the capacitance (C) is discharged via a controlable discharge impedance (VIC) upon detection by a voltage detection circuit (VDC) of a power supply source voltage drop. In this way, the interface circuit may still control the load current when the power supply source voltage is subsequently restored.
Abstract:
To supervise a telephone subscriber line (v'2, v'1) and provide it with adjustable AC and DC termination impedances from the exchange (v1, v2), these are supplied by an impedance synthesis multiple loop split into separate DC and AC loop parts by filters at the output of a sense amplifier in the common loop part and fed (e) through a Herter bridge. The amplifier AC output has however to be limited to avoid saturation by a larger DC signal. It now includes a Miller effect integrator output stage (A2) with a low pass frequency response supplying the DC loop and also feeding back an input stage (A1) so that the latter exhibits a high pass frequency response with a DC free output to drive the AC loop and the consequent ability to supply a larger AC output. Further circuits improve dial pulse detection (LP), reduce external capacitances (C1) and limit power consumption (PG5 and PG6).
Abstract:
A resequencing system is used for resequencing the cells of a cell stream having different input and output peak cell rates and which is conveyed through the series connection of :
an input circuit (IM1) controlled by a first time stamp generator (TSG1) and allocating to each cell of the cell stream an adapted time stamp value equal to the sum of a time stamp value then generated by the first time stamp generator (TSG1) and a variable virtual delay, and such that consecutive adapted time stamp values allocated to immediately consecutive cells differ by a time delay equal to at least the inverse of the output peak cell rate; a cell switching network (SN); and a resequencing unit (RSU1) associated to a second time stamp generator (TSG2) generating successive second time stamp values at a rate at least equal to the output peak cell rate, and resequencing the cells by subjecting them to an additional variable time delay which is such that the total delay of the cells is equal to the sum of the virtual delay allocated thereto and a predetermined constant value.