摘要
提出555时基电路的输出信号与输入信号之间具有时序特征.根据反映时序特征的状态转换图及单稳态触发器的工作特点,系统地研究了555单稳态触发器的设计方法,分析了外加触发信号的输入方式、电平幅度、持续时间要求、RC电路定时单元的接法及电容的充放电过程,并发现了一些新的设计方案.Multisim仿真及实际硬件验证证明了所提出设计方案的正确性.
Sequential characteristic between input signals and output signals in 555 timer base circuit is proposed.Design method of 555 monostable flip-flops is researched based on state diagram which reflects sequential characteristic.Input method,voltage altitude and lasting time of external trigger signals are analyzed.Timing unit in RC circuit and charge and discharge process of capacitance are discussed.New design methods are given.These design methods are verified by Multisim simulation as well as realistic hardware experiments.
出处
《浙江大学学报（理学版）》
CAS
CSCD
北大核心
2011年第2期177-181,184,共6页
Journal of Zhejiang University（Science Edition）
基金
辽宁省高等教育教学改革A类研究项目(2010-2011)(辽教发[2009]141号)
关键词
555时基电路
时序特征
单稳态触发器
电路设计
555 timer base circuit
sequential characteristic
monostable flip-flop
circuit design
