仿真软件在负反馈放大电路教学中的应用

Application of Simulation Software in the Negative Feedback Circuit Teaching

负反馈是模拟电路教学中的重点和难点,将Multisim仿真软件引入课堂教学,可以克服传统教学模式存在的问题。学生利用虚拟仪器直接观察仿真结果,加深其对负反馈放大电路的认识,理解负反馈的引入可以提高增益的稳定性、扩展频带、减小非线性失真以及负反馈电路的自激振荡及消除方法等难懂概念,使教学更灵活、有效。

Negative feedback circuit is difficulties and focus in analog circuit teaching. The Multisim simulation software is introduced into class teaching to solve the problems existing in traditional teaching model. The simulation results are observed directly by virtual instrument, and students can understand the concept and principle deeply, such as increased stability of gain, expanded bandwidth, improved nonlinear distortion by negative feedback and self-oscillation produced and eliminated. By using the software, teaching is more vividly and effectively.