An output buffer with slew-rate calibration for different TFT-LCD loadings

Author

Yeh, Chun-Chi ; Wang, Jia-Hui ; Tsai, Chien-Hung

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

fYear

2010

fDate

21-23 June 2010

Firstpage

512

Lastpage

515

Abstract

An output buffer with slew-rate calibration for different TFT-LCD loadings is presented. Unlike other output buffers of column drivers, the proposed output buffer adjusts the output current according to the loading capacitors. The settling time and slew-rate of the proposed output buffer are thus fixed in an acceptable range for different TFT-LCD loading capacitors, allowing more accurate color quality. The proposed output buffer amplifier is implemented on standard 0.35 μm CMOS 2-poly 4-metal process technology and simulated using HSPICE. The settling time of rising and falling for 10kΩ+50pF~10kΩ+600pF are 0.45μs~1.40μs and 0.75μs ~1.84μs, respectively.

Keywords

CMOS integrated circuits; buffer circuits; calibration; liquid crystal displays; operational amplifiers; thin film capacitors; thin film transistors; CMOS 2-poly 4-metal process technology; HSPICE simulation; TFT-LCD loading capacitors; color quality; column drivers; loading capacitors; operational amplifiers; output buffer amplifier; size 0.35 mum; slew-rate calibration; Analog circuits; Calibration; Capacitance; Capacitors; Driver circuits; Fault location; Liquid crystal displays; Shift registers; Thin film transistors; Voltage; TFT-LCD; column driver; output buffer; slew-rate calibration;

fLanguage

English

Publisher

ieee

Conference_Titel

Green Circuits and Systems (ICGCS), 2010 International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-6876-8

Electronic_ISBN

978-1-4244-6877-5

Type

conf

DOI

10.1109/ICGCS.2010.5543007

Filename

5543007