PROGRAMMABLE GAMMA CORRECTION BUFFER CIRCUIT CHIP AND METHOD FOR GENERATING GAMMA VOLTAGE

摘要

A programmable gamma correction buffer circuit chip and method for generating a gamma voltage, the programmable gamma correction buffer circuit chip comprising an operational amplifier (OP); the in-phase input end of the OP is connected to a reference voltage input end through a first resistor (R1); the out-of-phase input end of the OP is connected to an output end through a reference resistor (Rf); N second resistors (Rs) are connected in parallel between the out-of-phase phase input end of the OP and the ground, n being the number of parts obtained upon equally dividing a reference voltage (Vref) generated by the programmable gamma correction buffer circuit chip, Vref serving as the reference potential difference of each equally divided part, and each second resistor Rs being connected to a switch S in series. The improved structure of the programmable gamma correction buffer circuit chip does not require a MOS tube, thus reducing chip size and saving costs.