| 摘要 |
PURPOSE:To increase the noise reduction effect for the pulsative noise elimination circuit by giving the linear interpolation to the signals for the period when the noise exists. CONSTITUTION:Switch control signal generation circuit 7 generates control pulses SA, SB and SC via the output pulse equal to the noise pulse duration in the input signal S(t) generated from noise detection circuit 6. Input signal S(t-TD') passed through timing control delay circuit 8 is converted via switch 9 and holding circuit 10 into signal S'(t-TD') which holds the signal level immediately before the front edge of the noise during the noise period. At the same time, the level equal to the inclination of the staight line to give the interpolation to the noise period is held via switch 11, holding circuit 12, difference circuit 14, switch 15 and holding circuit 16 each. This level is then integrated at correction signal circuit 17 to be changed into correction signal h. Signal h is then compounded with signal S(t- TD'-TD) passed through delay circuit 13 at sum circuit 18 to obtain signal i the noise of which is reduced. |
