Area-efficient R-C DACs with low-offset push-pull output buffers for a 10-bit LCD source driver

Author

Zheng, Hao-Yuan ; Wang, Jia-Hui ; Tsai, Chien-Hung ; Chang, Chin-Tien ; Lee, Ching-Chung ; Wang, Chen-Yu

Author_Institution

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

fYear

2009

fDate

24-27 May 2009

Firstpage

1597

Lastpage

1600

Abstract

Area-efficient resistor-capacitor DACs (R-C DACs) and low-offset push-pull output buffers for a 10-bit LCD source driver are proposed. Comparing to a 10-bit resistor-string DAC (R-DAC), the 10-bit R-C DAC has a smaller area. A new output buffer with a push-pull function is adopted so that the source driver can drive the pixel with two-dot inversion to save power consumption. To reduce channel to channel deviations, an offset averaging method is adopted in this work. The simulated settling time is under 7 mus so it is suitable for UXGA LCD TV applications. The chip is fabricated using the TSMC 0.35 mum 2P4M CMOS process. The chip area is 1704times262 mum².

Keywords

CMOS digital integrated circuits; RC circuits; buffer circuits; digital-analogue conversion; driver circuits; liquid crystal displays; television displays; CMOS fabrication process; UXGA LCD TV application; area-efficient R-C DAC; channel deviation simulated settling time; low-offset push-pull output buffer; resistor-string DAC; time 7 mus; two-dot inversion power consumption; Analog circuits; CMOS process; Capacitors; Driver circuits; Energy consumption; Fault location; Signal sampling; TV; Thin film transistors; Voltage; LCD; one-dot inversion; output buffer; source driver; two-dot inversion;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on

Conference_Location

Taipei

Print_ISBN

978-1-4244-3827-3

Electronic_ISBN

978-1-4244-3828-0

Type

conf

DOI

10.1109/ISCAS.2009.5118076

Filename

5118076