Many practical amplifiers chain together a series of analog amplifier stages to obtain a high overall voltage gain.
许多实际的放大器将多个放大器级联起来，以获得较高的电压增益。
2
An instrumentation amplifier offers precise gain without feedback resistors, and, at any value of gain, it provides high input impedances at its noninverting and inverting inputs.
没有反馈电阻的仪表放大器提供精确增益，无论增益多大，放大器的同向和反向输入端提供高输入阻抗。
3
High efficiency and high linearity space traveling wave tube (TWT) is required for satellite communication system as a high power, highgain microwave amplifier.