Subscriber interface protection circuit

Details Subscriber interface protection circuit Subscriber interface protection circuit

2006-03-28

2006-03-28

Nadav, Ori (Department: 2811)

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

Regenerative type switching device

Device protection

C257S355000, C257S362000

Reexamination Certificate

active

07019338

ABSTRACT:
The present invention relates to a monolithic component of protection of a line against overvoltages than a determined positive threshold or smaller than a determined negative threshold, including in antiparallel a cathode-gate thyristor (Th1) and an anode-gate thyristor (Th2), the gate of the cathode-gate thyristor being connected to a negative threshold voltage (−V) via a gate current amplification transistor (T1), the gate of the anode-gate thyristor being connected to a positive threshold voltage (+V). The monolithic component is made in a substrate divided into wells separated by isolating walls (3, 4), the smaller surfaces of which are coated with insulating layers (5, 6), the smaller surface of the substrate being uniformly coated with a metallization (M1).

REFERENCES:
patent: 5243488 (1993-09-01), Bernier et al.
patent: 5274524 (1993-12-01), Pezzani et al.
patent: 5304823 (1994-04-01), Byatt
patent: 5684322 (1997-11-01), Bernier
patent: 5696391 (1997-12-01), Bernier
patent: 5828089 (1998-10-01), Bernier
patent: 0 388 022 (1990-09-01), None
patent: 0 687 051 (1995-12-01), None
patent: 0 721 218 (1996-07-01), None
patent: 0 742 592 (1996-11-01), None
International Search Report for PCT/FR 98/02907 filed Dec. 29, 1998.

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