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普通高中课程标准实验教科书物理选修3-2中《传感器》一章,以前沿科技为导入,内容新颖,大大激发了学生学习物理的兴趣.特别是最后一节《传感器的应用实验》,将理论和实际应用紧密结合起来,体现了很强的实用价值,在这里教科书介绍了应用较为广泛的一种非门电路――斯密特触发器,其中有这样一段介绍:当加在它输入端A的电压逐渐上升到某个值(1.6V)时,输出端Y会突然从高电平跳到低电平(0.25V),而当输入端A的电压逐渐下降到
General high school curriculum standard textbook physics elective 3-2 in the “sensor” chapter, with the introduction of cutting-edge science and technology, content novel, greatly stimulated students interest in learning physics.Especially the last section “sensor application experiment”, the theory Closely linked with the practical application, reflecting the strong practical value, where textbooks introduced a more widely used non-gate circuit - Schmitt trigger, which has such a description: when added to its input A (1.6V), the output Y suddenly jumps from high level to low level (0.25V), and when the voltage of the input terminal A gradually drops to