Patent ID: 8791685

Claim:
A bandgap reference voltage generator comprising: a current source part configured as current mirror to provide a first current, a second current, and a third current; a first current compensation part generating a first node voltage according to the first current and compensating a change of current due to changes of at least one of process, voltage, and temperature (PVT); a second current compensation part generating a second node voltage according to the second current and compensating a change of current due to changes of at least one of process, voltage, and temperature (PVT) by generating a fourth current and a fifth current which have change characteristics opposite to each other according to change of absolute temperature; an amplification part comprising a first input transistor which receives the first node voltage through its gate and a second input transistor which receives the second node voltage through its gate, and outputting a voltage to drive the current source part according the first node voltage and the second node voltage; a voltage providing part detecting amount of change in the fourth current and the fifth current, and providing body voltage to one of the first input transistor and the second input transistor according to the detected amount of change; and an output part outputting reference voltage according to the third current.