| 摘要 |
PURPOSE:To delete the noise mixed into an input signal by deciding the symmetricalness for the reference level of a sampled input waveform and an overall shift of the input signal from the reference level. CONSTITUTION:For decision of a level shift, a CPU4 reads the stored reference level EBO out of a memory part 5 and calculates a difference ¦EBO-EBi¦ between the level EBO and the level EBi obtained from an input signal S1. Then this difference value is compared with the decided value K2 stored in the part 5. If ¦EBO-EBi¦>K2 is satisfied, the data obtained from the signal S1 is invalidated like a case where the superposition of noise is detected. In such a case, the CPU4 does not perform the next operation and then samples the signal S1 again. |
