Title :
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
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;
Conference_Titel :
ASIC, 2001. Proceedings. 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-6677-8
DOI :
10.1109/ICASIC.2001.982549
