A Low Offset High Voltage Swing Rail-to-Rail Buffer Amplifier with for LCD Driver

2007 ◽  
Author(s):  
Guo-Teng Hong ◽  
Chih-Hsiung Shen
Keyword(s):  
High Voltage ◽  
Rail To Rail ◽  
Lcd Driver ◽  
Buffer Amplifier ◽  
Voltage Swing ◽  
Low Offset

A RAIL-TO-RAIL BUFFER AMPLIFIER FOR LCD DRIVER

2011 ◽  
Vol 20 (07) ◽  
pp. 1377-1387 ◽  
Author(s):  
CHIH-WEN LU ◽  
CHING-MIN HSIAO
Keyword(s):  
High Speed ◽  
Liquid Crystal Display ◽  
Stable State ◽  
Cmos Technology ◽  
Offset Voltage ◽  
Rail To Rail ◽  
Lcd Driver ◽  
Display Driver ◽  
Buffer Amplifier ◽  
Voltage Swing

A high-speed low-power rail-to-rail buffer amplifier, which is suitable for liquid crystal display driver applications, is proposed. An offset voltage is intentionally built in the second stage to cut off the transistors of last stage from the output node in the stable state and hence achieve low dc power consumption. The input referred offset voltage due to the built-in offset is very small. The buffer draws little current while static but has a large driving capability while transient. An experimental prototype buffer amplifier implemented in a 0.35-μm CMOS technology demonstrates that the circuit can operate under a wide power supply range. Quiescent current of 5 μA is measured. The buffer exhibits the settling time of 1.5 μs for a voltage swing of 0.1 ~ (VDD – 0.1) V under a 600 pF capacitance load. The area of this buffer is 30 × 98 μm2. The measured data show that the proposed output buffer amplifier is very suitable for LCD driver applications.

A Compact Low-Power High Slew-Rate Rail-to-Rail Class-AB Buffer Amplifier for LCD Driver ICs

2007 ◽  
Author(s):  
Jia-Hui Wang ◽  
Jing-Chuan Qiu ◽  
Hao-Yuan Zheng ◽  
Chien-Hung Tsai ◽  
Chen-Yu Wang ◽  
...  
Keyword(s):  
Low Power ◽  
Slew Rate ◽  
Class Ab ◽  
Rail To Rail ◽  
Lcd Driver ◽  
Buffer Amplifier

A COMPACT HIGH-SPEED LOW-POWER RAIL-TO-RAIL BUFFER AMPLIFIER FOR STEP-PULSE SIGNALS

2010 ◽  
Vol 19 (06) ◽  
pp. 1181-1197 ◽  
Author(s):  
CHIH-WEN LU ◽  
CHING-MIN HSIAO
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
High Speed ◽  
Cmos Technology ◽  
Feedback Loops ◽  
Common Source ◽  
Experimental Prototype ◽  
Rail To Rail ◽  
Buffer Amplifier ◽  
Voltage Swing

A compact high-speed low-power rail-to-rail buffer amplifier, which is suitable for driving heavy capacitive loads, is proposed. The buffer amplifier is composed of a pair of push-pull output transistors with two feedback loops consisting of a pair of complementary error amplifiers and a pair of complementary common-source amplifiers. The buffer draws little current while static but has a large driving capability while transient. A mutual bias scheme is also proposed to reduce the power consumption and the die area for LCD applications. An experimental prototype buffer amplifier implemented in a 0.35 μm CMOS technology demonstrates that the settling time is 1.5 μs for a voltage swing of 0.1 ~ (VDD–0.1) V under a 600 pF capacitance load. Quiescent current of 4 μA is measured. The area of this buffer is 32 × 109 μm2.

HIGH-SLEW RATE LOW-QUIESCENT CURRENT RAIL-TO-RAIL CMOS BUFFER AMPLIFIER FOR FLAT PANEL DISPLAYS

2011 ◽  
Vol 20 (07) ◽  
pp. 1277-1286 ◽  
Author(s):  
MERIH YILDIZ ◽  
SHAHRAM MINAEI ◽  
EMRE ARSLAN
Keyword(s):  
Power Supply ◽  
Monte Carlo Analysis ◽  
Cmos Process ◽  
Flat Panel Displays ◽  
Slew Rate ◽  
Flat Panel ◽  
Output Stage ◽  
Rail To Rail ◽  
Buffer Amplifier ◽  
Quiescent Current

This work presents a high-slew rate rail-to-rail buffer amplifier, which can be used for flat panel displays. The proposed buffer amplifier is composed of two transconductance amplifiers, two current comparators and a push-pull output stage. Phase compensation technique is also used to improve the phase margin value of the proposed buffer amplifier for different load capacitances. Post-layout simulations of the proposed buffer amplifier are performed using 0.35 μm AMS CMOS process parameters and 3.3 V power supply. The circuit is tested under a 600 pF capacitive load. An average settling time of 0.85 μs under a full voltage swing is obtained, while only 3 μA quiescent current is drawn from the power supply. Monte Carlo analysis is also added to show the process variation effects on the circuit.

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