60进制计数器错误原因与修改方法  

The Causes of a Modulo-60 Counter's Error and Its Modification Methods

作　　者：杨艳[1] 李继凯[1] 

机构地区：[1]广东石油化工学院计算机与电子信息学院,广东茂名525000

出　　处：《广东石油化工学院学报》2015年第4期63-66,共4页Journal of Guangdong University of Petrochemical Technology

摘　　要：在实际应用中常采用集成4位二进制计数器74LS161构成60进制计数器。对现有教材中的一道例题采用Multisim仿真并观察结果,发现其实构成的是50进制计数器。结合74LS161的逻辑功能表,分析了用74LS161构成60进制计数器时出现错误计数循环的原因,给出了两种修改电路设计的方法,并利用仿真实验进行验证。结果表明设计方法是正确的。A 4-bit integrated binary counter 74LS161 is often used to compose a modulo -60 counter in practical application ,A circuit from the existing textbook example is simulated with Multisim .The results show the circuit is a modulo -50 counter in fact .The reasons for wrong count cycle in using 74LS161 to compose modulo-60 counter is analyzed ,based on the logic function table of 74LS161 .Two Modifi-cation methods is given and verified with simulation experiment .

关 键 词：集成计数器 60进制 MULTISIM 

分 类 号：TN79[电子电信—电路与系统]