LSI for signal transmission

Details LSI for signal transmission LSI for signal transmission

1994-09-14

1998-11-10

Martin, David S.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307146, 257208, 257211, 375260, 375288, 379 90, H01H 8300

Patent

active

058348611

ABSTRACT:
A large scale integrated circuit has a first circuit section with input terminals external of the integrated circuit connected to output terminals of a second portion of the integrated circuit for use in an environment not requiring intrinsic safety. When the circuit is to be installed in an environment requiring intrinsic safety the external connectors are disconnected from one another. An excess voltage suppression circuit is connected to the external connections of the second circuit section.

REFERENCES:
patent: 4964140 (1990-10-01), Yonekura
patent: 5019814 (1991-05-01), Biggs et al.
patent: 5214318 (1993-05-01), Nakanishi et al.
patent: 5307340 (1994-04-01), Inoue et al.
patent: 5444740 (1995-08-01), Mizukami et al.
patent: 5448231 (1995-09-01), Takezoe
"Guidelines For Physical Layer Testing Low Speed, Voltage Mode", International FieldBus Consortium, Document ID No. IFC 910425 28, 1991.
"Proposal Of New Signal Transmitting System For Field Bus", ISA SP50 & IEC SC65C WG6 Joint Committee, Fuji Electric Co., Ltd., Nov. 1992 and Minutes, ISA/SP50-1992-473, Nov. 1992.

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