A two-phase, four and five boosting ratio, charge pump cell for LCD driver

Author

Yu, Hairong ; Chen, Zhiliang

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2001

fDate

2001

Firstpage

266

Lastpage

270

Abstract

In this paper the charge pump is designed to operate at 10 kHz with 100i A loading for LCD-driver in portable equipments. By estimation of the rise time of the Fibonacci-like charge pump, an optimal switching frequency is designed to make an excellent compromise between the rise time and the dynamic power dissipation. The simulating comparison results based on 1.2i m CMOS, p-substrate double-poly double-metal process parameters show that the charge pump has a high pumping speed and a high power efficiency. By some techniques, a new charge pump is proposed which can operate in versatile portable equipments supplied by 1.2 V, 3.3 V or 5 V

Keywords

CMOS integrated circuits; driver circuits; liquid crystal displays; low-power electronics; 1.2 V; 1.2 micron; 10 kHz; 3.3 V; 5 V; CMOS p-substrate double-poly double-metal process; LCD driver; boosting ratio; dynamic power dissipation; portable equipment; power efficiency; pumping speed; rise time; switching frequency; two-phase Fibonacci-like charge pump cell; Boosting; CMOS process; Capacitors; Charge pumps; Circuits; Clocks; Power dissipation; Switching frequency; Threshold voltage; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2001. Proceedings. 4th International Conference on

Conference_Location

Shanghai

Print_ISBN

0-7803-6677-8

Type

conf

DOI

10.1109/ICASIC.2001.982549

Filename

982549