在上期中我们介绍了7例实用电路,本期继续介绍另外8例电路. 8.单稳态触发电路图12所示的是由两个与非门等构成的单稳态触发电路.该电路要求输入负向触发脉冲,输出脉冲也为负向.如果要求输入正向脉冲,可以把电路中的与非门换成或非门,具体电路见图13所示.当然也可以在这两个电路的输入或输出端再加上反相门而任意改变输入或输出脉冲的极性. In the last issue, we introduced seven practical circuits, this issue continues to introduce another eight circuit 8. Monostable trigger circuit Figure 12 shows the monostable trigger circuit consists of two NAND gates, etc. The circuit requirements Enter the negative trigger pulse, the output pulse is also negative If you want to enter the positive pulse, the circuit can be replaced by a NAND gate or not, the specific circuit shown in Figure 13. Of course, these two circuits The input or output plus anti-phase gate and arbitrarily change the input or output pulse polarity.