第2講沖激響應(yīng)、卷積積分討論-文庫吧
2025-04-22 10:57 本頁面
【正文】 ?? ??)]0()0([)]0()0([0 222111 ???? ???? CCCC uuCuuCE R C1 C2 + uC1 + uC2 S (t=0) i iC1 iC2 清華大學(xué)電機(jī)系 節(jié)點(diǎn)電荷守恒 )0(211 ???????CCECuC可解得)0()0()0()0( 22112211 ???? ??? CCCC uCuCuCuC)0()()0()0( 212211 ??? ??? CCC uCCuCuCq(0+)= q(0) uC(?) = 1V 0V, e321e)131(1)( 3434?????? ?? ttu ttC? = R(C1+C2) s43?i iC1 iC2 清華大學(xué)電機(jī)系 A)(e92)(61)](e98)()321()([41dd3434111ttttttuCittC????????????????0V, e321e)131(1)( 3434?????? ?? ttu ttC0)0( V,1)0( ,0 21 ??? ?? CC uutV )()e321()()( 341 tttutC ???????V )()e321()( 342 ttutC ????u/V t 0 1 31uC1 uC2 全時(shí)間域表達(dá)式： 清華大學(xué)電機(jī)系 tuCiC dd 222 ?V )()e321()( 342 ttutC ????V )()e321()()( 341 tttutC ???????i/A t 1/6 2/9 iC1 4/9 1/6 iC2 i iC1 iC2 A)(e92)(61 341 ttitC ?????? A)(e94)(61 34tt t?? ???)](e98)()321[(21 34tt t?? ????i 無沖激 u/V t 0 1 31uC1 uC2 根據(jù)物理概念求電容電流 : ?? ? 00 V 32131)0()0(1 ?????????CCC uuu轉(zhuǎn)移的電荷 ?q1 = ? (2/3) = 1/6 C V 3/103/1)0()0(2 ?????? ?? CCC uuu轉(zhuǎn)移的電荷 ?q2 = ? 1/3 = 1/6 C 1/6 ?(t) A沖激電流 1/6 ?(t) A沖激電流 t 0
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