| 摘要 |
<p>It is object to provide an oversampling circuit and a digital to analog converter capable of realizing a smaller circuit and reducing a cost of parts. The oversampling circuit comprises four D flip-flops 10-1 through 10-4, four multipliers 12-1 through 12-4, three adders 14-1 through 14-3, and two integrating circuits 16-1 and 16-2. Input data is sequentially input into the four D flip-flops, and held therein. Each multiplier performs amultiplying process on the data held in the D flip-flops respectively corresponding one to one to the multipliers by different multiplicators in the first half and second half of one clock period. The multiplication results are added up by the three adders. Furthermore, two digital integrating operations corresponding to the sum are carries out by means of the two -integrating circuits. <IMAGE></p> |
