| 摘要 |
PURPOSE:To attain smooth signal interpolation even when a noise is detected and a gate circuit is closed by applying plural number of times of differentiating operations to an output of a detector and integrating the result an outputting it for the same number of times via the gate circuit and a holding circuit. CONSTITUTION:After one of outputs of the detector 5 is differentiated twice by two differentiating circuits 31a, 31b via a delay circuit 21, the result is given to integration circuits 32a, 32b via the gate circuit 22 and the holding circuit 24. The other output of the detector 5 is given to a noise detection circuit 23 and when a noise detecting circuit 23 detects the noise, the gate circuit 22 is closed. The holding circuit 24 holds a value just before the gate is closed, the value is integrated by the integration circuits 32a, 32b so as to reproduce the original signal waveform and it is given to a low frequency amplifier circuit 6. |
