使用单稳态触发电路作“延时”或“定时”用，由于受到元件和器件的影响，其精度不会太高。
The accuracy of delay or timing is not sensitive with monostable trigger circuit since electrical elements have influence on it.
应用CD4098单稳态触发器组成了三相过零触发电路，达到了较为理想的调功效果。
The three-phase zero-detection trigger made up of CD4098 single side stale trigger can produce ideal effect.
其次改变了系统的采样方式，采用双单稳态出发电路对调焦窗口进行选择，解决了原来存在的因中断产生的采样漂移问题。
Secondly we changed the sampling mode, using dual monostable multivibrators to select the focusing window, which solves the sampling drift problem raised by SCM break.
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