这些技术要求用普通的模拟电路技术是很难达到的。
All of these requirements were hard to achieve by the analog circuit nowadays.
实践证明，以单元电路为核心的模拟电子技术课程内容体系在教学中取得了良好的效果。
Practice show that, the curriculum content system of simulation electronic technology which take unit circuit as the core has achieved good effect in teaching.
基于TTL技术设计的四值施密特电路已用PSPICE模拟证明了具有理想的施密特电路功能。
Based on TTL technique, the designed quaternary Schmitt circuit is simulated with PSPICE and is proved to have the ideal Schmitt function.
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