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在宽频带大功率放大器研制中,一般希望放大器能在一定变化范围的激励电平下和所要求的频率范围内输出平稳而足够的功率.对于宽频带功率放大器,由于晶体管本身复杂的频率特性,虽可采用宽频带四配网络来展宽频带,但设计出的放大器在宽频带范围内(尤其是2个倍频程以上的频带)仍具有较强的频率特性,因而使放大器的输出功率在宽频带范围内大起大落,甚至过载而烧毁功放管.对于点频或窄带放大
In the development of broadband high-power amplifier, it is generally hoped that the amplifier will output stable and sufficient power under a certain range of excitation level and the required frequency range.For broadband power amplifier, due to the complicated frequency characteristics of the transistor itself, Although the wide band four-band network can be used to broaden the frequency band, the designed amplifier has strong frequency characteristics over a wide frequency range (especially in the frequency band of more than two octaves), so that the output power of the amplifier is Wide range of ups and downs, and even overload and burn the power amplifier tube. For the spot frequency or narrow band amplification