kAsin tsin wtd(wt)+2bsin wtd(wt) sin wtd(wt)+bcos wt2 4kA ra2 1 (1-cos 2wt)dt+-=co 2kA rwt--sin 2wt+=cosa aI sin 2a,+-, 712x-2may-ma1+小-sma 4k A-arcsin A 2AVAA k A arcsin x1=√42+B2=B 中=0 aa A AVA e(t)=Asn wt (2)死区特性描述函数 e(0=Asin wt 死区特性数学表达式为        = = + − = + = =       = + −       = − − + −       = − − + −       = − +         +       = −       = − +       = + −       = +     1 2 1 1 2 1 2 1 1 2 2 2 1 2 1 2 1 1 1 1 1 0 0 1 0 2 2 0 2 arcsin 1 ( ) 2 ( ) 0 arcsin 1 ( ) 2 1 ( ) 1 ( ) 2 1 arcsin 2 4 1 sin 1 sin 1 sin 2 1 arcsin 2 4 1 sin 2 cos 4 1 2 4 1 sin 2 cos 2 2 1 (1 cos 2 ) cos 2 4 1 sin ( ) cos 2 4 sin sin ( ) sin ( ) 4 1 1 1 2 1 1 1 1 A a A a A a e k A x N A x A B B A a A a A a A k A a A a A a A a A a A k A a A a A k A a A k A a wt wt k A A a wt dwt k A wtd wt b wt k A k A wt wtd wt b wtd wt B A jarctg                           e(t) = Asin wt （2）死区特性描述函数 e(t) = Asin wt 死区特性数学表达式为