| 术语 | feedback amplifier |
| 释义 | feedback amplifier 反馈放大器 An amplifier in which a portion of the output signal is fed back and combined with the input signal. By proper negative feedback(opposite phase)design, the gain of an amplifier can be made essentially independent of the active elements(transistors, etc.) in the amplifier circuit. The gain can therefore be made very controllable and stable, as can input and output impedance as well as linear and nonlinear distortion. 将输出信号的一部分反馈回去与输入信号相合成的一种放大器。合理设计的负反馈 放大器,其增益可以做到基本与放大电路中的有源器件(如晶体管等)无关,因而其增益可以 做到非常易于控制,非常稳定。其输入阻抗、输出阻抗以及线性和非线性失真等指标也 可以做到非常稳定和易于控制。 |
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