ABSTRACT
The sampled voltage is fed back in such a way that the closed-loop input voltage,
V
,
is the sum of the voltage,
V
,
across the input port of the amplifier and the voltage
V
, developed across
R
in the feedback subcircuit. Because
V
=
V
+
V
, the output port of the feedback configuration can be viewed as connected in series with the amplifier input port. On the other hand, output voltage sampling constrains the net load current,
I
, to be the algebraic sum of the amplifier output port current,
I
, and the feedback network input current,
I
.
