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3频率特性的低频补偿放大器低频增益的降低主要是耦合电容造成的。为改变低频特性,可以采用没有耦合电容的直流放大器,也可以在电路采取措施,进行低频补偿。一般的阻容耦合式放大电路的低频段的频率响应,最后可以用通用低频衰减特性来表示。在多级放大器中,应采用阶梯法来进行补偿。在这种情况下阶
3 frequency characteristics of low-frequency compensation amplifier Low-frequency gain reduction is mainly caused by the coupling capacitor. In order to change the low frequency characteristic, can adopt direct current amplifier without coupling capacitance, can also take measures in the circuit, carry on low frequency compensation. The frequency response of the low frequency band of the general RC capacitive amplifier circuit can be expressed by the general low frequency attenuation characteristic. In multistage amplifiers, the step method should be used to compensate. In this case order