从并联电压负反馈的角度，对输入电阻和输出电阻给出了下列4种方法的定量讨论。
From the negative feedback aspect of the parallel voltage, this paper quantitatively discusses input and output resistances by employing 4 methods.
所谓负反馈是指输出信号的一部分被送回输入端，与输入信号相减，从而削弱了有效输入信号。
Negative feedback occurs when a portion of the output signal of an amplifier is fed back and subtracted from the input signal, causing a reduction in the effective input signal.
电路中引入负反馈，使输入、输出电阻均发生变化，并且输入、输出电阻对放大电路有很大的影响。
The introduction of the negative feedback in circuit changes the input and output resistances, which have great influence on magnifying circuit.
根据电路原理，应用解析方法导出了四种形式负反馈放大器的输入、输出电阻关系式。
The input and output resistances of a negative-feedback amplifier is calculated by analytic method.
根据电路原理，应用解析方法导出了四种形式负反馈放大器的输入、输出电阻关系式。
The input and output resistances of a negative-feedback amplifier is calculated by analytic method.
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