Fault isolation arrangement for distributed logic memories

Abstract

Abstract TO PROVIDE FAULT DETECTION AND ISOLATION, A DISTRIBUTED LOGIC MEMORY (DLM) SYSTEM IS HIERARCHICALLY ORGANIZED IN A TREE-LIKE STRUCTURE INCLUDING A NUMBER OF RACKS, EACH OF WHICH INCLUDES A NUMBER OF LEVELS, EACH OF WHICH, IN TURN, INCLUDES A NUMBER OF COMPUTING ELEMENTS. EACH ELEMENT WHICH IS INTERCONNECTED TO TWO ADJACENT ELEMENTS SHARES COMMON OUTPUT AND PROPAGATE CIRCUITRY RESPECTIVELY WITH THE OTHER ELEMENTS OF THE SAME LEVEL. LIKEWISE, EACH LEVEL SHARES COMMON OUTPUT AND PROPAGATE CIRCUITRY RESPECTIVELY WITH THE OTHER LEVELS OF THE SAME RACK. FINALLY, EACH RACK SHARES COMMON OUTPUT AND PROPAGATE CIRCUITRY RESPECTIVELY IN CONNECTING TO A CONTROL UNIT. FAULT DETECTION AND ISOLATION CIRCUITSD ARE SITUATED IN THE LEVEL AND RACK OUTPUT AND PROPAGATE CIRCUITS. THE FAULT DETECTION CIRCUITS ON EACH LEVEL, UPON RECEIPT OF FUALTY SIGNALS FROM THE ELEMENTS OF THAT LEVEL, DISCONNECT THE OUTPUT AND PROPAGATE CIRCUITS OF THAT LEVEL FROM THE REST OF THE SYS- TEM AND INTERCONNECT THE TWO LEVELS ADJACENT TO THE DISCONNECTED LEVEL. IF THE FAULT CIRCUIT OF ANY LEVEL MALFUNCTIONS, THEN THE FAULT CIRCUIT OF THE CORRESPONDING RACK DETECTS FAULTY SIGNALS FROM ANY FAILED ELEMENT AND/OR FAILED LEVEL FAULT CIRCUIT AND ACCORDINGLY DISCONNECTS THE OUTPUT AND PROPAGATE CIRCUITS OF THE RACK IN WHICH THE FAILURE APPEARS FROM THE REST OF THE SYSTEM AND INTERCONNECTS THE TWO ADJACENT RACKS.

Inventors

• 👤 Bently A Crane

Bibliographic Details