transfer-function amplifier

例句：

1. 1. This device is designed to improve the signal-to-noise ratio of the audio signal.
   这种装置旨在提高音频信号的信噪比。
2. 2. The engineer used a transfer function amplifier to amplify the weak signal.
   工程师使用一个传输函数放大器来放大微弱的信号。
3. 3. The transfer function amplifier was used to boost the volume of the music playback.
   传输函数放大器被用来提升音乐播放的音量。