HIGH GAIN LOW POWER OP AMP FOR DRIVING THE FLAT PANEL DISPLAY

摘要

The present invention relates to Op-Amp for driving Flat Display, and more particularly to a high Gain and low Power Op-Amp, which mainly used Output part of the Driver for Liquid Crystal Display. This invention of Op-Amp having the Differential Input Amplifier, the Level Splitter, and the Output part, amplifies and outputs inputted Differential Signal to high Gain, comprising; The Phase Splitter, which outputs Positive Phase Signal and Negative Phase Signal of Input signal, which inputs the Output of Differential Input Amplifier and Level Shifter; The Output Buffer, which buffers the Output of the Phase Splitter. The present invention of Amplifier embodies high gray scale by using the Buffer, which uses the Phase Splitter and two PMOS (or NMOS) and obtaining the high open circuit voltage gain and embodies low power by decreasing the Quiescent Current of Buffer part by driving class B at the same time.