differential preamplifier差动前置放大器;差分式前置放大器
preamplifier stage前置放大级
preamplifier noise前置放大器杂讯;预放大噪声
parametric preamplifier参量前置放大器;参数前置放大器
biophysical preamplifier生理前置放大器
V preamplifier调谐器
Current Preamplifier电流前置放大器
Switched Preamplifier开关前置放大器
receiver preamplifier接收机前置放大器
N（名词） an electronic amplifier used to improve the signal-to-noise ratio of an electronic device. It boosts a low-level signal to an intermediate level before it is transmitted to the main amplifier 前置放大器 (Sometimes shortened to preamp)