Full protection component for a subscriber line interface circui

Details Full protection component for a subscriber line interface circui Full protection component for a subscriber line interface circui

1996-05-01

1998-10-27

Fahmy, Wael

Active solid-state devices (e.g., transistors, solid-state diode

Regenerative type switching device

Device protection

257355, 257358, H01L 2974, H01L 31111, H01L 2362

Patent

active

058280898

ABSTRACT:
A monolithic component for protecting a subscriber line interface circuit includes, in an N-type substrate, whose bottom surface is coated with a first uniform metallization, first and second portions separated by a P-type isolation wall. The first portion includes two vertical diodes having a common cathode corresponding to the bottom surface of the substrate, two vertical transistors having a common collector and a common base, the collectors corresponding to the bottom surface of the substrate. The second portion includes two sets each including a pair of head-to-tail parallel-connected vertical thyristors and a pair of head-to-tail parallel-connected vertical zener diodes for controlling the conduction of these thyristors.

REFERENCES:
patent: 4847724 (1989-07-01), Renous
patent: 5304823 (1994-04-01), Byatt
French Search Report from French Patent Application 95 05878, filed May 12, 1995.

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