图a
(1)下雨时比较器输出
(2)适当调大Rp1阻值,下雨时的湿度设定值将会
(3)请选用一个合适的逻辑门,补全虚线框1中电路
(4)小明发现电机M无法正常工作,经检测,是三极管V2损坏,现准备用2个NPN型三级管和1个电阻来替代原来的三极管。请帮他完成图b虚线框2中的电路(三极管采用共发射极接法)
图b
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2