EP 0606943 B1 19990804 - Switching device for switching television signals in a cable distribution system
Title (en)
Switching device for switching television signals in a cable distribution system
Title (de)
Schalteinrichtung zum Schalten von Fernsehsignalen für Kabelverteilungssystem
Title (fr)
Dispositif commutateur de signaux de télévision pour une distribution par câble
Publication
Application
Priority
FR 9300246 A 19930113
Abstract (en)
[origin: EP0606943A1] This relates to selecting one source from among a plurality, by means of shunt and series switches which are respectively closed or conducting and vice versa. In order to give access to four sources, for example, the device comprises two intermediate terminals (B1, B2), a series switch (SEa, SEb) is placed between the user and each of the two intermediate terminals, and each of the intermediate terminals is linked to two sources (IN1,IN2, or IN3, IN4) by a series switch (SE1, SE2, SE3, SE4) on each occasion. Moreover, each source (IN1, IN2, IN3, IN4) is linked to earth, in terms of alternating current, by a matching impedance in series with a shunt switch (Z1, SH1, or Z2, SH2 or Z3, SH3 or Z4, SH4). Applications: Cable television distribution. <IMAGE>
IPC 1-7
IPC 8 full level
H03K 17/00 (2006.01); H03K 17/04 (2006.01); H03K 17/76 (2006.01); H04H 20/78 (2008.01); H04N 7/16 (2011.01); H04N 21/61 (2011.01); H04N 21/647 (2011.01)
CPC (source: EP US)
H04H 20/78 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0606943 A1 19940720; EP 0606943 B1 19990804; DE 69419785 D1 19990909; DE 69419785 T2 20000217; ES 2137306 T3 19991216; FR 2700432 A1 19940713; JP H06268499 A 19940922; US 5422668 A 19950606
DOCDB simple family (application)
EP 94200031 A 19940107; DE 69419785 T 19940107; ES 94200031 T 19940107; FR 9300246 A 19930113; JP 163294 A 19940112; US 18126194 A 19940112