Arrangement for exchanging signals between separated circuit arrangements
Номер патента: CA1175501A
Опубликовано: 02-10-1984
Автор(ы): Aloysius J. Nijman, Franciscus A.C.M. Schoofs
Принадлежит: Philips Gloeilampenfabrieken NV
Опубликовано: 02-10-1984
Автор(ы): Aloysius J. Nijman, Franciscus A.C.M. Schoofs
Принадлежит: Philips Gloeilampenfabrieken NV
Реферат: PHN. 9828 20 ABSTRACT: Arrangement for transmitting at least two sig-nals from a first circuit arrangement to a separate second circuit arrangement. The first circuit arrange-ment comprises a plurality of signal sources, one side of which is connected to ground and the second circuit arrangement comprises a plurality of signal sinks, one side of which is connected to a second voltage reference point. In several uses, such as in automatic telephone exchanges where signals must be exchanged between the central part and the circuits of the periphery, such as the SLIC-circuits, a disturbing voltage may be present between the second voltage reference point and the ground. In order to realise a disturbance-independent signal transmission over a wide amplitude range with a small number of signal conductors, one signal conductor which includes an impedance having a high impedance value is provided between each of the signal sources of the first circuit arrangement and a separate signal sink of the second circuit arrangement. In addition, a sig-nal conductor which includes an impedance having a high impedance value is provided between the ground of the first circuit arrangement and a separate signal sink of the second circuit arrangement. The second circuit arrangement comprises means for linearily combining the currents flowing in the signal conductors, for generating signal currents which are proportional to the transmitted signals.
Method and circuit arrangement for controlling a subscriber line interface circuit
Номер патента: US20040071283A1. Автор: Herbert Zojer,Gerhard Noessing. Владелец: INFINEON TECHNOLOGIES AG. Дата публикации: 2004-04-15.