§5.2性质 ·拓扑性质(微/积分性质): 一微分: d(-()F()-() -1)对因果信号f(0)=0,L{pf()}=sF(s),p0 d p~s~10 pf(t)台sF(S) -2)F()-f(0.) -3)L{p2f()}=L{pf'()}=s[sF(s)-f(0]-f'(0) =s2F(s)-sf(0)-f'(0) 特别:f(0)=0,∫'(0)=0,…,f-(0)=0pf()→sF(s)12 §5.2 性质 • 拓扑性质(微/积分性质): – 微分: – 1) 对因果信号 – 2) – 3) d 0 0 d f t s f t f sF s f t L L d 0 0, , d f pf t sF s p t L p s pf t sF s ~ ~ j d 0 d f t sF s f t L 2 2 1 0 0 0 0 0 0, 0 0, , 0 0, n n n p f t pf t s sF s f f s F s sf f f f f p f t s F s L L 特别: