| 摘要 |
PURPOSE:To generate a consecutive analog signal without phase distortion by using a prescribed function and a coefficient so as to express a unit pulse reply signal. CONSTITUTION:A digital data generating section 10 generates a digital data VK sequentially for each prescribed sampling period T, and function generators 14-1-141 generate repetitively signal phi(t+T), phi(t), phi(t-T) repetitively at a period 3T sequentially in expressing the unit pulse response signal psi(t) by using a function phi(t) expressed by three partial polynomials as expressed in equation I. A digital signal processor 12 calculates a coefficient C according to equation II at each sampling time, the result is stored cyclicly sequentially in latch circuits 13-1-131, C1.phi(t+T), C2.phi(t), C3.phi(t-T) are calculated by multiplication type DA converters 15-1-151, a synthesis section 16 synthesizes outputs to convert it into an analog signal SA. Thus, a consecutive analog signal without phase distortion is generated. |
