Jeff Young
pfm Member
Unfortunately not with the circuit as is. Output DC voltage sits below the input dc voltage for both the buffer and the gain stage so you're going to need output coupling capacitors at least even with a split supply.
I'm trying to get my head around this. Most of the designs I've studied have had either LTP or CFP front-ends, neither of which has any voltage offset.
In the 729 is it as simple as 1 Vbe drop per emitter-follower (2 Vbe drops total), or is it more complicated than that?
The 321 is more of a head-scratcher for me. The output side looks familiar enough with an emitter-follower being driven by a double-BJT current sink. But I'm not sure what the function of Q1 and Q2 are. Is Q1 just an integrator for the feedback? But then I'm still unclear on what the function of Q2 is....