| 摘要 |
PURPOSE:To supply an interpolating signal to the original signal smoothly, by multiplying the difference between signal levels just before the leading edge and just after the trailing edge of a noise by a coefficient corresponding to the time width of the noise and by applying the multiplied result to the input of an integrating circuit. CONSTITUTION:An original signal with a noise put on is inputted from a terminal 4 to a main circuit 1 and is delayed by an analogue delay circuit 7. The noise included in the original signal is detected by a detection control circuit 3, and the time width of the noise is detected by a comparator 19. Levels of the original signal just before the leading edge and just after the trailing edge of the noise are held in sample hold circuits 12-1 and 12-2 of an interpolating circuit 2, and their level difference is detected by a differential amplifier 13. This level difference is divided in a dividing circuit 30 by the time width of the noise, and the result is inputted to an integrating circuit 14, and a lamp wave is generated by the circuit 14. The lamp wave and a signal, which is obtained by sampling and holding the noise section of the original signal from the circuit 1 by a sample hold circuit 15, are added and amplified by an adding amplifier 16 to interpolate the noise section with the lamp wave. A switch 8 is controlled by the sig nal from the circuit 3 of transmit the interpolating signal from the amplifier 16 only in the noise section. |
