Method for selecting a spare column and a circuit thereof

Details Method for selecting a spare column and a circuit thereof Method for selecting a spare column and a circuit thereof

1990-09-05

1991-09-03

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307449, 307219, 36523006, 371 102, 371 112, H03K 19003, H03K 19094, G11C 700

Patent

active

050457209

ABSTRACT:
There is provided a spare column selection circuit comprising a line switching pair arranged between a spare input/output line pair connected to a spare bit line and a normal input/output line pair connected to a normal bit line pair. The line switching pair are driven by an output of a spare column decoder. A normal line pull-up pair are connected to the corresponding normal input/output line so as to be driven by the output of the spare column decoder. An inverter produces a clock signal having an inverted signal phase against a clock from a spare column decoder, and the inverted clock signal connects the spare input/output line pair to the spare bit line pair.

REFERENCES:
patent: 4228528 (1980-10-01), Cenker et al.
patent: 4399372 (1983-08-01), Tanimoto et al.
patent: 4737957 (1988-04-01), Nohmi et al.
patent: 4739469 (1988-04-01), Oshiage et al.
patent: 4800302 (1989-01-01), Marum
patent: 4847810 (1989-07-01), Tagami
patent: 4855621 (1989-08-01), Hoffmann et al.
patent: 4862416 (1989-08-01), Takeuchi

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