Redundant rows in integrated circuit memories

Details Redundant rows in integrated circuit memories Redundant rows in integrated circuit memories

1983-01-14

1985-08-27

Fears, Terrell W.

Static information storage and retrieval

Addressing

365200, 365210, G11C 1140

Patent

active

045382476

ABSTRACT:
Decoding apparatus for an integrated circuit memory having normal rows of memory cells 10 and at least one selectively connectable redundant second row of memory cells 31 for being connected in place of one of the first rows 10 includes a redundant decoder (transistors 32, 33. . . n) connected to each of the redundant rows 31, the redundant decoder including a plurality of selectable connections (F.sub.1, F.sub.2 . . . F.sub.n) for creating an address for each of the at least one redundant rows 31; a control signal generating circuit (gates 45, 46, and 47) for generating a control signal of a first state until an address is supplied to the memory and of a second state if any of the redundant rows 31 are selected by the address, and another decoder (transistors 23 and 39) connected to receive control signal .phi..sub.C from the generating circuit for controlling normal rows 10 and the redundant row 31 in response thereto.

REFERENCES:
patent: 4250570 (1981-02-01), Tsang et al.

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