Block specific spare circuit

Details Block specific spare circuit Block specific spare circuit

1994-05-26

1996-08-20

Westin, Edward P.

Electronic digital logic circuitry

Reliability

Redundant

326 50, 326 10, 327525, 365200, H03K 19003

Patent

active

055482252

ABSTRACT:
A circuit for selecting a block spare in a semiconductor device is designed with a programmable circuit (14), storing an internal address and producing an address match signal AM and a block select signal BS in response to first (A) and second (B) address signals and the internal address. A global spare circuit (28) produces a global spare select signal (GSS), in response to the address match signal. A block spare circuit (34) produces a block spare select signal (BSS), in response to the global spare select signal and the block select signal.

REFERENCES:
patent: 4862417 (1989-08-01), List et al.
patent: 4881202 (1989-11-01), Tsujimoto et al.
patent: 5208776 (1993-05-01), Nasu et al.
patent: 5257229 (1993-10-01), McClure et al.
patent: 5270976 (1993-12-01), Tran
patent: 5311472 (1994-05-01), Ota

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