At "BJT AC analysis" chapter of "Electronics devices and circuit theory" of R Boylestad and L Nashelsky there is such scheme (picture attached) showing feedback pair configuration. For AC analysis they made equivalent circuit - what I do not understand WHY in equivalent circuit the current source [Beta1*Current_base1] (transistor Q1) is UP going against Vo(output)? in equivalent this current also go to Rb resistor, the only current to Rb from original scheme is from Q1 base, but as far as I understand [Beta1*Current_base1] means collector-emitter current of Q1 which goes to Q2 base, not current from Q1 emitter to Q1 base . please explain
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