Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1997-10-10
2000-03-21
Sherry, Michael J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361106, H02H 322
Patent
active
06040972&
ABSTRACT:
A protection device for a communication system is inserted between a circuit side and a subscriber side and includes a protection circuit part and trimmable resistors. The protection circuit part includes a tip line and a ring line each extending between an input terminal and an output terminal. The tip line and the ring line each contain at least one thermistor with positive temperature characteristic or one protection resistor as overcurrent-protecting element. The output terminals of the tip line and the ring lines are connected, say, by a diode bridge of which one terminal is grounded and another terminal connected to a power source. Trimmable resistors are each connected to a corresponding one of the output terminals of the protection circuit part and are adapted to be trimmed such that impedance imbalance between the tip and ring lines can be reduced.
REFERENCES:
patent: 4467310 (1984-08-01), Jakab
patent: 4661979 (1987-04-01), Jakab
patent: 4695916 (1987-09-01), Satoh et al.
patent: 4878038 (1989-10-01), Tsai
patent: 4964160 (1990-10-01), Traube et al.
patent: 5057964 (1991-10-01), Bender et al.
patent: 5146384 (1992-09-01), Markovic et al.
patent: 5198794 (1993-03-01), Sato et al.
patent: 5198957 (1993-03-01), Welty et al.
patent: 5204799 (1993-04-01), Stibila
Murata Manufacturing Co. Ltd.
Sherry Michael J.
LandOfFree
Protection device for communication does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Protection device for communication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protection device for communication will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-735401