调查学生对双极结型晶体管电路的理解
Investigating student understanding of bipolar junction transistor circuits
摘要：
本文报告的研究代表了一个系统的，多年的调查学生的双极结型晶体管电路的行为的理解使用各种不同的任务，以隔离和探测晶体管电路行为的关键方面。在这项研究中的参与者是本科生就读于上师物理电子课程在三个机构，以及本科生在上师工程电子课程的机构之一。这项研究的结果表明，许多学生还没有制定一个强大的概念理解的双极结型晶体管电路的功能，即使在所有相关的指令。最值得注意的是，当被要求分析晶体管电路对输入信号的影响时，学生们经常应用适合分析电路直流偏置行为的推理。然而，学生们在回答更有针对性的问题时，往往表现出对晶体管基本行为的了解。这篇文章提供了深入了解学生对晶体管电路的思考，描述了最普遍的概念和推理困难，并讨论了一些重要的指导意义。
英文摘要：
The research reported in this article represents a systematic, multi-year investigation of student understanding of the behavior of bipolar junction transistor circuits using a variety of different tasks to isolate and probe key aspects of transistor circuit behavior. The participants in this study were undergraduates enrolled in upper-division physics electronics courses at three institutions, as well as undergraduates in upper-division engineering electronics courses at one of the institutions. Findings from this research indicate that many students have not developed a robust conceptual understanding of the functionality of bipolar junction transistors circuits even after all relevant instruction. Most notably, when asked to analyze the impact of a transistor circuit on input signals, students frequently applied reasoning appropriate for an analysis of the circuit's dc bias behavior. However, students often displayed knowledge of fundamental transistor behavior when responding to more targeted questions. This article provides insight into student thinking about transistor circuits, describing the most prevalent conceptual and reasoning difficulties identified and discussing some important implications for instruction.
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