Method and apparatus for testing a video display chip

Static information storage and retrieval – Read/write circuit – Testing

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Details

36523006, 365231, G11C 700

Patent

active

061153052

ABSTRACT:
A video chip includes test circuitry for detecting opens and shorts. The circuitry includes a series-connected chain of transistors and a test register. There is a circuit for the column lines and for the row lines. A bit pattern is driven onto the column or the row lines and received in the corresponding test circuitry. The pattern is read out and compared against the input pattern to detect faulty lines.

REFERENCES:
patent: 4654827 (1987-03-01), Childers
patent: 5392248 (1995-02-01), Truong et al.
patent: 5555522 (1996-09-01), Anami et al.
patent: 5682389 (1997-10-01), Nizaka
patent: 5684809 (1997-11-01), Stave et al.

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