automatic frequency control

基本解释

For welding thicker pieces, automatic frequency control should be adopted.
对于较厚的焊件，应进行频率自动控制。
Automatic gain control(AGC)and automatic frequency control(AFC)were also integrated into the chip.
芯片内部还集成了自动增益控制（AGC）、模拟自动频率控制（AFC）模块。
Based upon the same idea, circuits having remarkable advantages such as frequency difference polarity discriminator circuits and automatic frequency control circuits are also proposed.
基于同样的原理，文中还介绍了具有明显优点的频差极性判别电路及自动调频电路。

a system in a radio or television receiver by which the tuning of an incoming signal is accurately maintained ( abbr: AFC)