| 摘要 |
PURPOSE:To simplify circuit constitution and to reduce the number of transistors to be used by providing a NOT circuit to invert a carry, and supplying the output of the NOT circuit to the input terminal on the other side of an AND circuit to the input terminal on one side of which an input code bit is supplied. CONSTITUTION:The carry of an adder 14 is supplied to the NOT circuit 15. The output of the NOT circuit 15 is inputted to the input terminal on the other side of the AND circuit 13. All inversion data go to 1s only when all data bits are 0s, and the carry 1 is generated since 1 is added on them by the adder 14. The carry 1 is inverted to 0 by the NOT circuit 15, and is supplied to the AND circuit 13, therefore, a code bit outputted from the AND circuit 13 goes to 0 even when the input code bit shows 1. |
