摘要
分析了普遍的六管CMOSSchmitt触发器管子宽长比设计公式,从触发器的工作原理出发指出了其不尽合理之处。根据I.M.Fianosky提出的触发器实际的阈值电平理论,考虑M2和M5两管对阈值电平的影响,提出了新的CMOSSchmitt触发器宽长比设计公式。举例说明了在一定的设计考虑和工艺条件下如何利用这一公式进行设计。
An improved design formula of CMOS Schmitt trigger is introduced. The transistor scale design formula of general CMOS Schmitt trigger is analyzed and the drawback is taken into account. From the discussion, something not proper to the formula is pointed out. Based on the theory of the true threshold voltage of the trigger presented by I. M. Fianosky, the influence on threshold voltage caused by M2 and M5 is considered. A practical example is given to explain how to design a CMOS Schmitt trigger with the new design formula under certain design and process conditions.
出处
《电子器件》
EI
CAS
2005年第3期505-508,共4页
Chinese Journal of Electron Devices
基金
国家自然科学基金(60476019)
江苏省自然科学基金(BK2003052)资助项目。
作者简介
程坤(1981-),男,硕士研究生,从事微传感器处理电路设计的研究,ck_seu@,yahoo.com.cn:
黄庆安,男,教授,博士生导师。