Hey everyone, Im currently reading Horowitz & Hill and am a little confused on the topic of the intrinsic emitter resistance (re). I understand that this resistance is essentially the dynamic resistance of the base-emitter diode. I assumed that when analyzing a circuit this resistance should always be placed in series with the emitter. However H&H seem to place this resistance from the emitter to ground in the emitter followers they demonstrate. In the case of the emitter follower circuit this makes sense because the low re means that the circuit will have a low output resistance as expected. I just dont understand why they placed it to ground. The circuits in question are attached.