A low-quiescent current two-input/output buffer amplifier for LCDs

Author

Lu, Chih-Wen ; Yin, Ping-Yeh ; Hsuan-Lun Kuo ; Pennisi, Salvatore

Author_Institution

Dept. of Eng. & Syst. Sci., Nat. Tsing Hua Univ., Hsinchu, Taiwan

fYear

2012

fDate

20-23 May 2012

Firstpage

1975

Lastpage

1978

Abstract

This study proposes a low-quiescent current two-input/output buffer amplifier for LCD applications. A current reuse technique is employed in the output stage of the buffer amplifier to reduce the quiescent current consumption. An experimental prototype 6-bit LCD column driver with the proposed buffer amplifiers implemented in a 0.35-μm CMOS technology demonstrates that an average value of 0.6 μA static current is consumed in one channel driver. The settling time to settle within 0.2% of the final voltage is 6 μs under a 30-KΩ-resistance and 30-pF-capacitance load. The area of this two-input/output buffer amplifier is 21.5 μm × 190 μm.

Keywords

amplifiers; buffer circuits; liquid crystal displays; CMOS technology; LCD applications; capacitance 30 pF; current reuse technique; low-quiescent current two-input/output buffer amplifier; resistance 30 kohm; size 0.38 mum; Active matrix liquid crystal displays; CMOS integrated circuits; CMOS technology; Differential amplifiers; Educational institutions; MOS devices; Operational amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Conference_Location

Seoul

ISSN

0271-4302

Print_ISBN

978-1-4673-0218-0

Type

conf

DOI

10.1109/ISCAS.2012.6271664

Filename

6271664