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晶体管具有较大的内部反馈,影响到晶体管放大器的稳定放大.在固定频率的晶体管放大器中可以采用固定元件中和的办法抵消掉一部分内部反馈,从而提高了晶体管放大器的稳定放大量.但在可变调谐的晶体管放大器中就不可能用固定元件中和的办法,此时如何提高晶体管放大器的稳定放大量呢?利用级联电路,可以用较低截止频率的晶体管在较高的频率下做成较高增益的晶体管放大器.晶体管级联高频放大器比一般高频放大器有其特别的优越性.
The transistor has a large internal feedback, affecting the steady amplification of the transistor amplifier. Fixed-element transistor amplifier can be used to neutralize the fixed part of the way to offset part of the internal feedback, thereby increasing the stability of the transistor amplifier amplification. Tuning transistor amplifier can not be fixed components and ways to neutralize, then how to improve the stability of the transistor amplifier amplification? The use of cascaded circuit, you can use the lower cut-off transistors at higher frequencies made Higher Gain Transistor Amplifiers. Transistor cascaded high frequency amplifiers have particular advantages over typical high frequency amplifiers.