Semiconductor device with an error detecting and displaying circ

Details Semiconductor device with an error detecting and displaying circ Semiconductor device with an error detecting and displaying circ

1991-06-07

1994-06-28

Teska, Kevin J.

Excavating

371 251, G01R 3128

Patent

active

053253698

ABSTRACT:
A semiconductor device with an error detecting and displaying circuit included in the device for detecting whether or not a semiconductor unit within the device has a predetermined output according to a given input value, and for displaying the outputted results indicating an error state of the device. The error detecting and displaying circuit for a semiconductor unit having an input circuit, a logic processing circuit and an output circuit comprises an additional logic processing circuit connected to the semiconductor unit for logically operating logic signals sent from said semiconductor device. A comparison circuit is also connected both to the additional logic processing circuit and to the output circuit of said semiconductor unit for comparing signals from the additional logic processing circuit with signals from the output circuit to thereby output the compared results. A driver is connected to the comparison circuit for producing an enabling signal depending upon the compared results applied from the comparison circuit. A display is connected to the driver for indicating whether an error occurred in the semiconductor unit, depending upon the enabling signal sent from the driver.

REFERENCES:
patent: 4481628 (1984-11-01), Pasquinelli
patent: 4654850 (1987-03-01), Rodrigues et al.
patent: 4893072 (1990-01-01), Matsumoto
patent: 4942576 (1990-07-01), Busack et al.
patent: 4985901 (1991-01-01), Cohen et al.
patent: 5218606 (1993-06-01), Eguchi et al.

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