| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance the precision of digital data by separating a sampling noise and a quantization error noise of an analog input signal from the analog input signal. SOLUTION: Analog input signals are sampled respectively for a prescribed period andΔΣ-modulated (600), theΔΣ-modulated signals are sampled for a prescribed period respectively in time division, averaged by 1st digital filter processing (605), an output of the 1st digital filter is sampled for a prescribed period and a 2nd digital filter processing eliminates a high frequency component from the sampled signal.</p> |
