• 2022-06-08
    若系统函数 [tex=7.357x2.571]Vr+S244kHczHQi5U5WwYgAVU8/A17Oj9lF23Ee5zC/nflBM2ZWbKi5lwsYT/4+UI[/tex] 激励为周期信号 [tex=9.071x1.357]Btby3unMUACtlAOllga2OhAewyPwVmToSWXxsvH/xkg=[/tex] 试求响应 [tex=1.929x1.357]jD+phoUVlLiu0qimeiORbA==[/tex][tex=1.929x1.357]jD+phoUVlLiu0qimeiORbA==[/tex] 画出 [tex=1.643x1.357]j6KcqgyprXeRIkkNI3dxdw==[/tex], [tex=1.643x1.357]p6P234qupidP+NNJ+StGXQ==[/tex] 波形, 讨论经传输是否引起失真。
  • 解:[tex=39.929x5.929]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[/tex]则 [tex=37.929x2.643]yySkgW+ms+yXA+KkJ4sluXExRXVKIYb3RQatJhndwfUXiC7wH4DcThirmjomi4xy6S/dIbdhrfiirweETiFKOEQsisjDr2Cci4pTn/Kkim81nVZuVA4agRKjhTfEvaejVnOcYcm2U8AjLuQVR+vDiK3s8AxUBwIioX40rCa0+BgApn7obsPeGoIeBctHWg+xurvZmau+OcNg8vDnI92z9hZWWjdWBT5WD0fpwtUEfhP1olsbuif3JwDb/fyVYpLQ[/tex][tex=1.643x1.357]j6KcqgyprXeRIkkNI3dxdw==[/tex]  和 [tex=1.643x1.357]p6P234qupidP+NNJ+StGXQ==[/tex] 的波形如图 [tex=1.786x1.143]XHxmx7LhfLulASYY0gvGAA==[/tex] 所示。因为 [tex=15.0x2.643]Vr+S244kHczHQi5U5WwYgKRFU0wrdonGMNPCrcr3mlP2Qd50HmPvC0432nyaMAHXi+dFQmFJuYjo6BcsRf46HQUYnLDXGAJeEFOccdvxfu6Lh6B8x9Mp0saaDhQn5DVWsFR7njqZDzphGt1aKH0CHki+jgmQb40KMAmCGxUE8IU=[/tex] 其幅频特性不为常数, 相频特性也不是 [tex=0.643x0.786]B0PC2AKEHpSnHKwlNNx+FA==[/tex] 的线性函数, 故响应 [tex=1.643x1.357]p6P234qupidP+NNJ+StGXQ==[/tex] 必然有失真。[img=554x199]17a642eae591c6f.png[/img]

    举一反三

    内容

    • 0

      求下列函数 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 的像函数 [tex=1.929x1.357]CsHYmgN8a4Yt6bxTnBWLzw==[/tex].[p=align:center] [tex=7.357x1.5]V92zCeihgNFbCDChhSEi98E8M59qocW5X5D7ZDTewTInQoHiPouyg2FdZodvC/Eh[/tex][br][/br]

    • 1

      求下列时间函数[tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 的拉氏变换[tex=1.929x1.357]CsHYmgN8a4Yt6bxTnBWLzw==[/tex].[tex=4.857x1.5]LEBgqjtc0uD467ch5lj0m+acby1R/ZP7Lp/bAklVN/0=[/tex]

    • 2

      求下列函数 [tex=1.643x1.357]Wfem9oxh0ZS7nZ3KGomKoQ==[/tex] 的像函数 [tex=1.929x1.357]CsHYmgN8a4Yt6bxTnBWLzw==[/tex].[p=align:center] [tex=9.786x1.5]tDq6lTjpW1wUdmFiOpG7uXtILH2dVr1NLDgqVYoS9ayn/ZZk07UJfOdNSQE7proYjrrpy88YT0K/376MPneU1g==[/tex][br][/br]

    • 3

      证明线性时不变系统有如下特性:即若系统在激励[tex=1.643x1.357]j6KcqgyprXeRIkkNI3dxdw==[/tex]作用下响应为[tex=1.643x1.357]p6P234qupidP+NNJ+StGXQ==[/tex],则当激励为[tex=2.286x2.071]LZQ2Y9PJeU17iR0lBwfJeB2uPflqA2p7BrX7IyAf0n8=[/tex]时响应必为[tex=2.286x2.071]ptiyppJDfeBHrT5AAIKhkI24e+dIPefPpkAORLvuIMc=[/tex]。

    • 4

      求图中电路的系统函数 [tex=2.143x1.357]ZEs3Fxm0pu2tbUnzmEGMDg==[/tex] 和冲激响应, 设激励信号为电压 [tex=1.929x1.357]OF/C02HaBWHZH4cUtP7u3A==[/tex] 响应信号为电压 [tex=1.643x1.357]p6P234qupidP+NNJ+StGXQ==[/tex][img=296x170]17a530aa11d9b33.png[/img][br][/br]