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在电子技术高度发展的今天,集成运算放大器已成为模拟电子学的核心器件。它的应用面广量大,“虚地”、“虚短”则是分析集成运放应用电路最常用、最重要的基本概念。如何使学员牢固地掌握它,并学会正确地运用?正是模拟电子技术课程教学中值得探讨的一个问题。下面谈谈我们如何针对虚地、虚短概念进行“讲清概念、分析实例,开拓启迪”教学三部曲的。第一步讲清概念首先我们注意到选用醒目的符号,以便使这个重要的概念具有简单、明了,而又确切易懂的表达形式。为此我们选用希腊字母δ作下标,把输入量和反馈量的差值,即加到运算放
In today’s highly developed electronic technology, integrated operational amplifier has become the core of analog electronics. Its wide range of applications, “virtual ground”, “virtual short” is the most commonly used integrated circuit analysis of the application of the circuit, the most important basic concepts. How to make the students master it firmly and learn how to use it correctly? It is a problem worth exploring in the teaching of analog electronic technology. Now let’s talk about how we can teach trilogy “to clarify concepts, analyze examples and enlightenment” for the concept of virtual ground and virtual shortness. The first step to clarify the concept First of all, we note that the selection of eye-catching symbols, in order to make this important concept has a simple, clear, but the exact and understandable form of expression. To this end, we use the Greek letter δ as the subscript, the difference between the input and the feedback amount, that is added to the operational amplifier