二进制上行计数器.ewb

Multisim2001软件的仿真电路实例261例

Electronics Workbench Circuit File
Version: 5
Charset: ANSI
Description: 
"在上图中所示的计数器是利用在输入脉冲的下降沿触发JK触发器的计数器。在这种电路中，如        图附2.63波形图所示，对于输入T，输出Q1、Q2在其下降沿进行初始值的翻转。假定最初两级的输出Q1、Q2都被复位为“0”，则在输入T的第1各脉冲，F1的Q1输出进行“0”→“1”的翻转。在第2各脉冲，由于Q1由“1”翻转为“0”，其下降沿使F2也翻转，所以在两个时钟脉冲后，Q1=0，Q2=1。以后进行同样的变化。由计数器真值表知，脉冲数从0到3计数，在4时进行清零，这就构成了二进制的二位计数器。" 

EncryptionType: 2
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