pre-IF amplifier

例句：

1. 1.The pre-IF amplifier is essential for the proper functioning of the radio.
   前置放大器对于收音机的正常运作至关重要。
2. 2. In audio engineering, the pre-IF amplifier is used to boost the signal before it reaches the main amplifier.
   在音频工程中，前置放大器用于在信号到达主放大器之前提升信号。
3. 3. The pre-IF amplifier helps to reduce noise and interference in the audio signal.
   前置放大器有助于减少音频信号中的噪声和干扰。