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在各种通讯电路中,大量应用电感和电容组成的匹配网路。我们对它的要求是:①阻抗变换与匹配,②滤波、③提高传输效率,④结构简单、调正方便。下面分“Γ”、“π”、“T”、及变压器耦合等情况研究。一、“Γ”型网路有一晶体管其输出阻抗为R_o、予与下级管子的输入阻抗R_i匹配,此时R_o>R_i,直接联结势必造成功率损耗加大,传输效率下降。为此,将较小者R_i串联一个虚数阻抗jX(如为电感
In a variety of communication circuits, a large number of matching network composed of inductors and capacitors. Our requirements are: ① impedance transformation and matching, ② filtering, ③ improve transmission efficiency, ④ simple structure, easy to adjust. The following points “Γ ”, “π ”, “T ”, and transformer coupling and other research. First, the “Γ” type of network has a transistor whose output impedance is R_o, which is matched with the input impedance R_i of the lower pipe. At this moment, R_o> R_i, the direct connection will inevitably cause the power loss to increase and the transmission efficiency to drop. For this purpose, the smaller one, R_i, is connected in series with an imaginary impedance jX (eg, inductance)