如图9-3所示,非周期信号的时域描述形式为()。 A. u(t)=[10x1(t-3)-10X1(t-6)]V B.u(t)=[3x1(t-3)-10...

作者: tihaiku 人气: - 评论: 0
问题 如图9-3所示,非周期信号的时域描述形式为()。
选项 A. u(t)=[10x1(t-3)-10X1(t-6)]V B.u(t)=[3x1(t-3)-10X1(t-6)]V C.u(t)=[3x1(t-3)-6X1(t-6)]V D.u(t)=[10x1(t-3)-6X1(t-6)]V
答案 A
解析 正确答案是A。 提示:该非周期信号是两个非周期信号的叠加,即u(t)=u1(t)+u2(t) 其中:u1(t)=10x1(t-3)V,如图9-6(a)所示;u2(t)=10x1(t-6)V,如图9-6(b)所示。

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