Amplifiers – Combined with automatic amplifier disabling switch means
Patent
1998-11-20
2000-09-19
Pascal, Robert
Amplifiers
Combined with automatic amplifier disabling switch means
330124R, H03F 114
Patent
active
061218324
ABSTRACT:
An intermediate amplifier device (20) with a signal amplification stage (21) in a transmission network in which signals can be transmitted from a central station (23) to a number of receivers (24) by way of a number of transmission lines, which are connected to one another in a tree structure, with a number of intermediate amplifier devices of the same type is characterized in that the intermediate amplifier device has a detection device (22) for detecting a malfunction (28) in the transmission line (27) connected to the intermediate amplifier device, a switching device (26) for coupling and uncoupling the transmission line (27) to or from the central station, as well as a delay element (25) with a delay time t.sub.i for the delayed reaction to a malfunction detected by the detection device (22) by means of a correspondingly delayed actuation of the switching device. As a result, in the event of a malfunction, only the last intermediate amplifier device before the malfunctioning line section as well as subsequent line parts possibly connected to it are affected, but not network sections that do not receive their signals by way of the affected intermediate amplifier device. Furthermore, the localization of the malfunction is made easier.
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"Von Kabelfernsehen zur Kommunikation" in Funkschau, Jun. 1987, pp. 46--40.
Alcatel
Nguyen Khanh Van
Pascal Robert
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