| 摘要 |
PURPOSE:To attain DA conversion with power consumption equal to that in the case when only one DA converter is used although plural DA converters are used, by converting digital signals of plural systems into analog signals by a time division method. CONSTITUTION:In a figure, the DA converters in four systems convert digital signals A0-Ak into analog signals in a DA converting part 1 and hold their samples in sample holding part 5 to obtain an output Aout during the period T1 of a time division signal S1. During the period T2 of a time division signal S2, digital signals B0-B1 are converted into analog signals by a DA conversion part 2 and their samples are held by a sample holding part 6 to obtain an output Bout. In the same manner, signals C0-Cm, D0-Dn are converted from digital to analog signals by DA converting parts 3, 4 and their samples are held by sample holding parts 7, 8 respectively to obtain outputs Cout, Dout during the periods T3, T4 of time division signals S3, S4. |
