与一些音量控制置于输入端的电路不同，这个前级放大器的特征噪声能够随同信号一起衰减。
Any noise characteristic of the preamp circuit is attenuated along with the signal, unlike circuits where the volume control is before the input.
本文对固态线性功率放大器的研制包括：前级放大器的研制、驱动级放大器的研制、末级放大器的研制。
There are three development for the Middle Power Amplifier : the first stage power amplifier, the drive stage power amplifier and the last stage power amplifier .
微波、毫米波系统的噪声系数基本上取决于前级放大器的噪声系数，所以低噪声放大器是接收系统中相当重要的部件。
The noise figure of a microwave or millimeter-wave system basically lies on the noise of the front amplifier, so the Low Noise Amplifier (LNA) plays critical role for the receiving system.
应用推荐