intermediate frequency amplifier

例句：

1. 1.The radio used in the car is an intermediate frequency amplifier.
   汽车中使用的收音机是一个中频放大器。
2. 2. The engineer designed an intermediate frequency amplifier to improve signal quality.
   工程师设计了一个中频放大器来提高信号质量。
3. 3. The amplifier was used to boost the weak signal from the satellite dish.
   放大器被用来增强来自卫星碟的微弱信号。