| 摘要 |
PURPOSE:To prevent the generation of disable operation against multiple selection and non-selection of a tap, by forming the circuit in such a way that an input is not given to an operation circuit and the operation is performed with a prescribed operation input when the tap selection for plural number of input circuits is done. CONSTITUTION:Input conditions 1a-1c to be preset are selected at taps 2a- 2c and given to AND circuits 5a-5c, and 6a-6c. the circuits 6a-6c produce outputs 7a-7c when two taps among the taps 2a-2c are selected at the same time. The output enters an OR circuit 8, where an output 9 is produced. The output 9 is inverted 10 and becomes an inhibiting condition of the circuits 5a- 5c. Thus, the circuit 5a-5c are made effective only when no output 9 exists and ineffective when the output 9 exists. Further, the output 9 is introduced to an AND circuit 11, which gives the preset operating condition 12 to an operation circuit 3, where the operation is done with the condition 12 and gives an output 4. |
