15.
    发明专利
    未知

    公开(公告)号:IT7968914D0

    公开(公告)日:1979-10-04

    申请号:IT6891479

    申请日:1979-10-04

    Abstract: A transceiver inserted between a signal source and a two-wire or one-wire line, designed to transmit balanced or unbalanced digital signals to a remote station at the opposite end of the line while receiving similar signals from the latter station, comprises a first and a second amplifier with inputs connected to the line at a proximal and a distal end of a line-terminating impedance, respectively. Each amplifier has an inverting output connected to a noninverting output of the other amplifier, the two nodes formed between the interconnected outputs being connected to respective inputs of a differential third amplifier feeding a signal receiver. The gain of the first amplifier is half that of the second amplifier whereby the locally generated signals are suppressed in the output of the third amplifier. The several amplifiers are realized in integrated circuitry and may be provided with switches for selective changeover between a balanced and an unbalanced mode of operation.

    16.
    发明专利
    未知

    公开(公告)号:AT206525T

    公开(公告)日:2001-10-15

    申请号:AT97908176

    申请日:1997-03-05

    Abstract: A probe for fault-actuation devices has a transistor which is utilized to insert a reference signal into a fault-insertion point. The emitter and collector are connectable to the fault-insertion point and a reference signal and a capacitor with a capacitance greater than the capacitance of parasitic components is connected between the base and the emitter.

    PROCEDE ET SYSTEME POUR LA GENERATION DE PANNES

    公开(公告)号:MA24942A1

    公开(公告)日:2000-04-01

    申请号:MA25705

    申请日:1999-07-26

    Abstract: UN PROCÉDÉ POUR LA GÉNÉRATION DE PANNES SUR UNE PLURALITÉ DE MODULES (C1, C2..., C1...CN) D'ÉQUIPEMENTS ÉLECTRONIQUES PRÉVOIT D'ÉQUIPER LESDITS MODULES (C1) DE RESPECTIFS MOYENS DE GÉNÉRATION DE PANNE, ET D'ASSOCIER AUXDITS MODULES (C1) DESDITS RESPECTIVES UNITÉS DE COMMANDES DESDITS RESPECTIFS MOYENS DE GÉNÉRATION DE PANNE. CES UNITÉS DE COMMANDE SONT CAPABLES DE COMANDER LA GÉNÉRATION SÉLECTIVE DE PANNES PAR LES MOYENS DE GÉNÉRATION DE PANNE EN FONCTION DES RESPECTIFS SIGNAUX DE COMMANDE DE GÉNÉRATION DE PANNE. LES DIFFÉRENTES UNITÉS DE COMMANDE ÉTANT RELIÉES ENTRE ELLES PAR L'INTERMÉDIAIRE D'UNE STRUCTURE à BUS, DE PRÉFÉRENCE DU TYPE SÉRIEL ÉQUILIBRÉ. DES MOYENS GÉNÉRATEURS DE SIGAUX DE COMMANDE, SONT PRÉVUS POUR ENVOYER LES SIGNAUX DE COMMANDE DE GÉNÉRATION DE PANNE VERS LES UNITÉS DE COMMANDE à TRAVERS LA STRUCTURE à BUS.

    18.
    发明专利
    未知

    公开(公告)号:NO983884D0

    公开(公告)日:1998-08-24

    申请号:NO983884

    申请日:1998-08-24

    Abstract: A probe for fault-actuation devices has a transistor which is utilized to insert a reference signal into a fault-insertion point. The emitter and collector are connectable to the fault-insertion point and a reference signal and a capacitor with a capacitance greater than the capacitance of parasitic components is connected between the base and the emitter.

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