指输出频率与输入控制电压有对应关系的振荡电路(VCO)，频率是输入信号电压的函数的振荡器VCO，振荡器的工作状态或振荡回路的元件参数受输入控制电压的控制，就可构成一个压控振荡器。-Refers to the output frequency and input voltage control oscillation (VCO) circuits, corresponding relationship with frequency is a function of the input signal voltage of the oscillator VCO, the working state of the oscillator and oscillating circuit element parameters controlled by the input voltage of the control, can constitute a voltage-controlled oscillator.