A High Slew Rate Buffer Amplifier Employing MTCMOS Technique for Flat Panel Display

Abstract

This paper address a low power, high speed class AB buffer amplifier topology for liquid crystal display applications which offer a rail to rail common mode input range. The presented circuit use two comparator circuit inside it to enhance the slewing capabilities with a limited power consumption and it draw a very small quiescent current during static operation for rail to rail common mode input range. The circuit describes here the capacitive load behaviour with reduced distortion at the output node for swing characteristics. By applying MTCMOS (Multi threshold CMOS) reduction technique leakage current is reduced from 56nA to 52nA, power is reduced from 377.3 pW to 221pW, reduced slew rate and tranconductance of 4.363. A buffer circuit can run 1nF of load capacitance of achieving a rise time 800E-12, duty cycle is 4.5, Average group delay is 221E-3, unity gain frequency is 221.7E-3 and harmonic frequency is 1.532 at 20 Hz. The circuit has been demonstrated at 45 nm technology.

Survey on Single Stage Amplifiers for Column Drivers in Active Matrix LCD Panels Leading to a Highly Linear Rail-to-Rail Robust Amplifier

“…However, in the mid 90's flat panel displays were introduced and dominated the market ever since [2]. The first successful flat panel was the plasma displays, which provided higher image quality when compared to CRT technology [3]. However, it was not successfully utilized in small portable applications.…”