按照书中463页的有这样一句话:since the resistance presented to the collector of Q3 is relatively small compared to ro of Q3,we need not to consider the output resistance of the devices in the calculation。
该怎么理解这句话呢?意思是从 Q3collector看到Q7和Q5的电阻相对Q3的输出电阻ro很小,所以等效为交流地吗?