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众所周知,负反馈是提高电子设备参数稳定性的有效方法。但是,在相敏放大器里采用负反馈就比较困难,因为在相敏放大器输出端获得直流(脉动)信号,而在相敏放大器输入端输入的是交流信号。
It is well known that negative feedback is an effective way to improve the stability of electronic equipment parameters. However, it is more difficult to use negative feedback in the phase-sensitive amplifier because a direct current (ripple) signal is obtained at the output of the phase-sensitive amplifier and an alternating current signal is input at the input of the phase-sensitive amplifier.