transistor 41 and coupled to the supply voltage terminal 23 by a capacitor 44 transistor 41 has a source connected to the supply voltage terminal 23 and a drain connected to feedback terminal 38 transistor 42 has its drain connected to the drain of transistor 39 its gate connected to the current output terminal 13 and its source connected to the drain of transistor 43 the source of transistor 43 is connected to node 37 and its gate is connected to the emitter of transistor 6 the feedback stage 4 provides additional stability to the operation of the bandgap reference stage 2 if the current flowing through transistor 6 were to deviate from its optimum value a corresponding change in voltage would appear at the gate of transistor 43 through the action of the current mirror comprising transistors 14 and 15 this in turn would cause a change in voltage in the opposite direction at the gate of transistor 41 the voltage at feedback terminal 38 will change the bias on the base of transistor 32 such that the current in the current mirror comprising transistors 14 and 15 will be brought back to its original value this restores the voltage at the bandgap reference node 24 to its original value since it depends upon the current flowing in the current mirror comprising transistors 14 and 15 because the base of transistor 6 is coupled to the bandgap reference node 24 by transistor 19 its original voltage will also be restored the bandgap reference voltage output at the bandgap reference node 24 is developed by forcing different current densities through transistors 5 and.