Protection circuit and a node for a communications system using

Details Protection circuit and a node for a communications system using Protection circuit and a node for a communications system using

1997-11-17

1999-11-23

Leja, Ronald W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

H02H 100

Patent

active

059911395

ABSTRACT:
A protection circuit prevents a surge applied to one end of a signal line from being applied to a circuit connected to another end of the signal line. The protection circuit includes a first diode having an anode coupled to the signal line and a first capacitor having a first electrode coupled to a cathode of the first diode and a second electrode coupled to a first potential. A second capacitor has a first electrode coupled to the signal line and a second diode has a cathode coupled to a second electrode of said second capacitor and an anode coupled to the first potential. A first inductor is coupled between the cathode of the first diode and the cathode of the second diode. A power supply terminal is applied with a power supply potential and is coupled to one end of the first inductor.

REFERENCES:
patent: 3956717 (1976-05-01), Fisher et al.
patent: 4247953 (1981-01-01), Shinagawa et al.
patent: 4254442 (1981-03-01), Dijkmans et al.
patent: 5390337 (1995-02-01), Jelinek et al.

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