A CMOS bandgap reference (BGR) voltage generator circuit has a passive resistor
T-network of low resistance connected between the inverting and non-inverting inputs
of the op-amp in the circuit. The op-amp's output is connected to the gates of
three PMOS transistors and the drains of two of the transistors are connected in
a looped manner to the input terminals of the op-amp. The T-network is placed between
these drains that connect to the op-amp.