Hi all, I was reading AoE 2e chapter on BJT transistors. When discussing the emitter follower configuration the authors state the following (p.71 - Follower with split supplies):
"Because signals often are near ground it is convenient to use symetrical positive and negative supplies. This simplifies biasing and eliminates coupling capacitors.
Warning: You must always provide a dc path for base bias current, even if it goes only to ground."
Could somene please clarify the warning for me: why is this necessary?
Thanks,
Todor