A gamma reference voltage generator includes first and second resistors between a base voltage source and an input node, a third resistor coupled to a first node between the first resistor and the second resistor, a first transistor coupled to the input node and coupled to a first output node, a fourth resistor coupled between the first transistor and the input node, an operational amplifier coupled to the first node and coupled to a second terminal of the third resistor, a second transistor coupled to the first transistor, coupled to the second terminal of the third resistor and a second output node, and coupled to an output terminal of the operational amplifier, a fifth resistor and a first capacitor coupled in parallel between the second output node and the base voltage source, and a plurality of resistors coupled between the first output node and the second output node.