摘要
根据等效电路,应用基尔霍夫定律,导出了多级并联负反馈放大器上限截止频率fhf的解析表达式.新关系式能直观、较准确地描述fhf与电路中各元件参数间的关系.证明了原表达式存在缺陷.
A new formula of the upper cutoff frequency fhf of multistage amplifier with parellel negativefeedback is gotten out by the method of circuit analysis according to kirchhoff's Law.This new formula can allroundly describe the relation between fhf and parameters in the circuit.It is proved that the method of block diagram doesn't give expression to kirchhoff's law of circuit.
出处
《信阳师范学院学报（自然科学版）》
CAS
2003年第4期405-407,422,共4页
Journal of Xinyang Normal University(Natural Science Edition)
关键词
多级放大器
并联负反馈
上限截止频率
基尔霍夫定律
解析式
multistage amplifier
parallel negative-feedback
upper cut-off frequency
kirchhoff's law
analytic formula
