Patent ID: 7511694

Claim:
A source driver that responds to image data by generating an output signal which can be used to drive a flat panel display, the source driver comprising: a gamma decoder that is configured to select one of a plurality of first analog gray voltages as a first voltage based on some upper bits of the image data, to select one of a plurality of second analog gray voltages as a second voltage based on other upper bits of the image data, and to selectively output at least one of the first voltage and the second voltage as a plurality of distributed analog signals in response to lower bits of the image data; and an amplifier that is configured to interpolate between the distributed analog signals from the gamma decoder to generate the output signal of the source driver, wherein the amplifier comprises: a plurality of bias circuits that are each configured to generate a bias current; and a plurality of MOSFETs each having a source, a drain, and a gate terminal, wherein the gate terminal of each of the MOSFETS is separately connected to receive a different one of the distributed analog signals from the gamma decoder, and one of the source and drain terminals of each of the MOSFETS is separately connected to a different one of the bias circuits to receive the bias current, and the other one of the source and drain terminals of each of the MOSFETS is connected together at an output node to generate an interpolated signal, wherein the output signal is based on the interpolated signal.