I'm reading "The art of electronics" and at page 106 the author states ".... an npn emitter follower
cannot sink current and a pnp follower cannot source current.". What does he mean with this statement ? Why an emitter follower cannot do that?
So, he continue "The result is that a single-ended follower operating between split supplies can drive a ground-returned load only if a high quiescent current is used". How is the last statement related to the first?
I really find hard to understand what the author means in this paragraph.
cannot sink current and a pnp follower cannot source current.". What does he mean with this statement ? Why an emitter follower cannot do that?
So, he continue "The result is that a single-ended follower operating between split supplies can drive a ground-returned load only if a high quiescent current is used". How is the last statement related to the first?
I really find hard to understand what the author means in this paragraph.