Self Biased Complementary Differential Amplifier for Liquid Crystal Display

ABSTRACT: The proposed buffer achieves high-speed, draws a small quiescent current during static operation and offers a rail-to-rail in between input & output using complementary MOS differential amplifier. The circuit provides enhanced slew rate with a low power consumption by exploiting two current comparators embodied in the input stage, which sense the input signal transients to turn on the output stage transistors. A rail-to-rail stacked mirror differential amplifier is used to amplify the input signal difference and supply the bias voltages for the output stage. Simulations show that the proposed buffer can drive a 2-nF column line load within.6µs settling time under a full voltage swing, while drawing only 4µA static current, with slew rate 12v/µs, power consumption is 1.05 mW, for 3-V power supply. I