摘 要:电容三点式振荡电路在高频振荡电路中应用广泛,该电路结构复杂,元器件较多,信号传输路径不直观,学生在学习时难以理解。文章设计了一种典型电容三点式振荡电路,对该电路进行静态工作点计算与分析,使电路工作在放大状态。再通过 Multisim 软件进行仿真验证与分析,该电路不需要电源开关增加扰动就能起振,振荡频率与理论计算相符。该电路对硬件要求低,易于操作,可以促进学生理解振荡电路的结构,参数设置的依据和方法。
关键词:三点式振荡;Multisim;振荡频率
DOI:10.19850/j.cnki.2096-4706.2023.04.016
中图分类号:TN32 文献标识码:A 文章编号:2096-4706(2023)04-0061-03
Design of Capacitance Three-Point Oscillation Circuit Based on Multisim
WU Wenying
(Guangdong Machinery Technician College, Guangzhou 510450, China)
Abstract: The capacitance three-point oscillation circuit is widely used in high-frequency oscillation circuit. The circuit has complex structure, many components and unintuitive signal transmission path, which is difficult for students to understand when learning. In this paper, a typical capacitance three-point oscillation circuit is designed. The static operating point of the circuit is calculated and analyzed to make the circuit work in the amplified state. Through the simulation verification and analysis of Multisim software, the circuit can vibrate without increasing the disturbance of power switch, and the oscillation frequency is consistent with the theoretical calculation. This circuit
has low hardware requirements and is easy to operate. It can promote students to understand the structure of oscillation circuit, the basis and method of parameter setting.
Keywords: three-point oscillation; Multisim; oscillation frequency
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作者简介:吴文英(1984.09—),女,汉族,湖北武汉人,工程师,硕士,研方方向:电子技术。