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本文介绍了功率放大器设计中的一种新方法。为解决稳态指标和瞬态指标的矛盾,采用了双极点补偿法,可在保持比较深的负反馈情况下,降低增益交越频率。同时通过采用场效应管差动电路和菱形差动电路,发挥晶体管的特长,避免出现电流饱和现象,大大提高了电路的转换速率,从而改善了放大器的稳态指标和瞬态指标。通过实际电路的设计进行了试验验证,达到了预期的效果。
This article describes a new approach to power amplifier design. In order to solve the contradiction between the steady state index and the transient index, a double pole compensation method is adopted, which can reduce the frequency of the gain crossover while maintaining the relatively deep negative feedback. At the same time, through the use of FET differential circuit and diamond-shaped differential circuit, the advantages of the transistor to play, to avoid the phenomenon of current saturation, greatly improving the circuit conversion rate, thus improving the amplifier steady-state indicators and transient indicators. Through the actual circuit design test validation, to achieve the desired results.