| 摘要 |
PURPOSE:To provide a modulation signal generation device capable of continuously controlling from the state where a modulation frequency is fixed up to the state where a random property by a noise is added around the frequency. CONSTITUTION:A band of a white noise generator 21 is limited by a band-pass filter 22 to be outputted through a multiplier 24 as a modulation signal. The band-pass filter 22 whose coefficient is set by a coefficient table 23, and is constituted so that the Q is varied continuously from an oscillation state of infinity to the state where the Q is lowered. In such a case, when the Q is made the infinity, the frequency of the modulation signal becomes a fixed value, and according to lower the Q, the modulation signal added with the white noise is obtained. |
