| 摘要 |
<p>PURPOSE:To obtain the digital output signal of a sampling period T2 sec by storing the prescribed number of the digital input signal of a sampling period T1 sec, selecting and outputting the prescribed number of sample signals and the prescribed pair of coefficients for the T2 sec and adding respective multiplication outputs of respective outputs. CONSTITUTION:The prescribed number of input sampling signals s (mT1) impressed to an input terminal I is stored into a memory 1 for a T1 sec, and a first selector 2 selects and outputs a prescribed number of sample signals for T2 sec in the relation of MT1=NT2 (M AND N are integers) from the memory 1. An N pair of coefficients is accumulated into a coefficient bank 3 and respective pairs and respective coefficients are synchronized, selected and outputted with the first selector 2 by a second selector 4. Respective outputted sample signals and the coefficients are multiplied by a multiplier 5 and respective multiplied outputs are added by an adder 6. Thus, the same action as the FIT digital filter is executed, and at an output terminal O, an output sampling signal, which becomes s(nT2) to convert s (mT1) for T2 sec, can be obtained.</p> |
