| 摘要 |
PURPOSE:To attain the detection of a malfunction at the outside of the malfunction detecting capability of a multiplier by deciding it as the occurrence of the malfunction when a scanned specific consecutive bit string does not satisfy all 0 or all 1. CONSTITUTION:The titled system consists of a divided register 1, a divider register 2, normalizing circuits 3, 4, an approximation inverse table storage unit 5, a multiplicand selection circuit 6, a multiplier selection circuit 7, a multiplicand register 8, a multiplier register 9, a multiplier 10, a multiplication result register 11, a bit string scanning circuit 12 and a malfunction decision circuit 13. Thus, whether a specific consecutive bit string among products outputted from the multiplier 10 is al 0 or all 1 is checked and when the condition is not satisfied, it is decided that the malfunction takes place. |
