| 摘要 |
In an A/D converter for electrical signals, the difference, between the instantaneous analog input signal Y(t) and a previous analog signal value Y(t-T), is converted in a fast analog-to-digital converter (3) to a digital sum value. This sum value is added to the preceding digital value, stored in a buffer memory (7, 7'), and the result is fed to a slow but precise D/A converter (2) for generation of the next Y(t-T) value. This has the advantage that good results can be obtained with A/D converters less expensive than those heretofore required to obtain such results.
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