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短波接收系统由于受多径效应等影响,信号时强时弱。在一些终端设备上希望得到较平稳的音频信号而又不使谐波畸变指标降低。图1采用的是TL084集
Shortwave receiving system due to multipath effects and other effects, the signal is strong and weak. On some terminal devices, it is desirable to obtain a smoother audio signal without degrading the harmonic distortion index. Figure 1 uses the TL084 set