施密特电路的时序特征及门级设计
THE SEQUENTIAL CHARACTERISTIC OF SCHMITT CIRCUIT AND ITS DESIGN AT GATE LEVEL
-
摘要: 该文根据施密特电路对输入信号具有两种检测阈值的工作特点,提出了施密特电路与用作存贮元件的触发器之间具有相同的时序特征。利用时序电路的设计方法,本文系统地研究了基于集成门电路的各种施密特电路,并发现了一些新的设计方案。PSPICE模拟证明所设计的电路具有理想的施密特电路特性。
-
关键词:
- 施密特电路; 时序特征; 电路设计
Abstract: Based on the working characteristic of Schmitt circuits which have two detection thresholds to input signals, this paper proposes that Schmitt circuits have the same sequen-tial characteristic as flip-flops which are used as memory units. With the design procedure of sequential circuits, varieties of Schmitt circuits based on integrated gate circuits are systemati-cally investigated, and some new designs are found. PSPICE simulations prove that the circuits designed in this paper have ideal characteristic of Schmitt circuits. -
间阎,数字电了技术基础(第三版),北京,高等教育出版社, 1989,320-332.[2]J.M.Rabaey,Digital Integrated Circuits,A Design Perspective,New York,Prentice-Hall Inter-national,Inc,1996,363-369.[3]杭国强,吴训威.基于开关信号理论的电流控阐技术三值ECL施密特电路,电子学报, 1997,25[5),49-52.[4]Hang Guoqiang,Wu Xunwe,Research on ternary TTL Schmitt trigger,J.of Electronics(China),1998,15(1):35-42.[5]杭国强、吴训威,基于开关厉号理论的控闻技术与二值ECL施密持电路,电路与系统学报,1998,3(2),15-20.[6]Shen Jizhong ,P.D.Tougaw,Design of symmetric ternary current-mode CMOS Schmitt inverter,Int.J.Electronics,1998,85(4),477-482.[7]吴训威,赵小杰,脉冲电路中的变阀技术-施密持电路,电子与仪表技术, 1992,(2),1-5.[8]谭建生,李东,陈维良,数字电路与逻辑设计,北京,电子工业出版社, 1998,26l-263. -
计量
- 文章访问数: 2049
- HTML全文浏览量: 89
- PDF下载量: 475
- 被引次数: 0
下载:
