变压器耦合LC正弦波振荡器的分析

在高频电子线路的教学中，变压器耦合反馈振荡器是LC正弦波振荡器中的重要内容。本文以常用的瞬时极性法分析了变压器耦合振荡电路的相位起振条件，以环路增益T的形式推导了振荡器的振幅起振条件，从而清晰地阐述了振荡器的工作原理，振幅起振条件及振荡频率与电路中各参数的关系。

Analysis of Transformer Coupling LC Sine Wave Oscillator

Transformer coupling oscillation is of enormous importance to the LC sine wave oscillator in high frequency electronic circuits teaching. This paper analyses the phase startup conditions of the transformer coupling oscillation circuit by using instantaneous polar law and deduces the amplitude startup conditions of the oscillator in the form of loop gain, which clearly explains the working principles of transformer coupling LC sine wave oscillator, the amplitude startup conditions, and the relationship between oscillation frequency and parameters in the circuits.