Differential amplifier and a data driving device

A differential amplifier, comprising:

• an output circuit stage comprising a first output transistor disposed between a first voltage rail and the output side, and a second output transistor disposed between a second voltage rail and the output side;
• an input circuit stage configured to generate differential currents according to differential input voltages;
• a current mirror circuit stage configured to control gate terminals of the first output transistor and the second output transistor according to the differential currents;
• and
• a boosting circuit stage configured to additionally supply dynamic current to the current mirror circuit stage in response to changes in the differential input voltages.

A data driving device, comprising:

• a latch circuit configured to latch pixel data comprising grayscale values for pixels;
• a digital-to-analog converter configured to convert a digital signal corresponding to the pixel data into an analog voltage;
• and
• a buffer circuit comprising a rail-to-rail class-AB type amplifier, and configured to supply a data voltage obtained by amplifying the analog voltage using the amplifier to the pixel, and additionally supply dynamic current to an input circuit stage or a current minor circuit stage of the amplifier in response to changes in the analog voltage.