Circuit and method for detecting column-line shorts in integrate

Details Circuit and method for detecting column-line shorts in integrate Circuit and method for detecting column-line shorts in integrate

1993-10-26

1995-02-21

LaRoche, Eugene R.

Static information storage and retrieval

Read/write circuit

Testing

371 211, G11C 700

Patent

active

053922484

ABSTRACT:
The column-line short detection circuit of this invention includes a special test circuit that turns off wordlines (15), a N-channel transistor (23) for each column line (18), a decoder (19a) that uses only the least significant column address (20d) for input to the test circuit, and a sensor (SA) to detect current between shorted column lines (18). Because the column-line short detection circuit of this invention uses only the least significant address as input for column decoder (19a), it requires a very small number of transistors.

REFERENCES:
patent: 4477884 (1984-10-01), Iwahashi
patent: 4597062 (1986-06-01), Asano
patent: 4720818 (1988-01-01), Takeguchi

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