Title :
A compact rail-to-rail buffer with current positive-feedback for LCD source driver
Author :
Wang, Jia-Hui ; Zheng, Hao-Yuan ; Tsai, Chien-Hung ; Chang, Chin-Tien ; Lee, Ching-Chung ; Wang, Chen-Yu
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
A new compact rail-to-rail buffer amplifier for active matrix liquid crystal display source driver applications is proposed. Two complementary buffer amplifiers driving a pair of column lines are used to realize a rail-to-rail driver. The compact buffer amplifier has a large driving capability with the function of charge and discharge provided by the current positive-feedback (CPF). The CPF can increase the charge capability in conventional class-A pMOS input buffer amplifiers and increases the discharge capability in conventional class-A nMOS input buffer amplifiers. The compact rail-to-rail buffer amplifier is implemented using 0.35 mum CMOS 2-poly 4-metal process technology. The quiescent current consumed is 2.8 muA and 3 muA for a pMOS input buffer amplifier and an nMOS input buffer amplifier, respectively.
Keywords :
buffer circuits; driver circuits; feedback amplifiers; LCD source driver; active matrix liquid crystal display source driver; compact rail-to-rail buffer; current positive-feedback; quiescent current; Active matrix liquid crystal displays; Active matrix technology; Application specific integrated circuits; Driver circuits; Electrodes; Liquid crystal displays; MOS devices; Power dissipation; Rail to rail amplifiers; Voltage;
Conference_Titel :
VLSI Design, Automation and Test, 2009. VLSI-DAT '09. International Symposium on
Conference_Location :
Hsinchu
Print_ISBN :
978-1-4244-2781-9
Electronic_ISBN :
978-1-4244-2782-6
DOI :
10.1109/VDAT.2009.5158091
