Title :
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
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;
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
DOI :
10.1109/ICGCS.2010.5543007
