Here, I am referring to voltage-feedback amplifier (VFA) and current-feedback amplifier (CFA). A basic schematic is given below for each.
I am curious about the position of compensating capacitor, when both circuits are compared. In VFA, compensating capacitor is connected in parallel between input and output of voltage amplifier (between base and collector of BJT). But in case of CFA, the compensating capacitor is connected in parallel between output (collector) and ground of voltage amplifier. Why is it so? Why not the same in both configurations? How does compensating capacitor has any influence on CFA's frequency plot?
Obviously, in both circuits, frequency compensation technique differs. In VFA, compensating capacitor compensates Miller Capacitance of a BJT. Why isn't the same technique used in case of CFA? On what principle is frequency compensation of CFA through compensating capacitor (between voltage amplifier's output and ground) based on?