The automatic amplitude control uses a peak detector, a comparator and a low pass filter.The automatic amplitude control is conrected to the VCO by a feedback loop to keep the VCO output constant.

• 自动振幅控制电路由峰值检测、比较器和低通滤波器几部分构成，自动振幅控制电路与压控振荡器组成的反馈环路控制压控振荡器的输出恒定。