一种用于LCD驱动的电荷泵电路

A Charge Pump Circuit for LCD Drivers

基于GSMC0.18μm±9VCMOS三阱工艺,设计了一种用于LCD驱动的正、负压电荷泵电路。该电荷泵采用共享耦合电容的结构并,结合了一种新的衬底偏置技术,在较小的面积代价下,可达到较强的驱动能力和较高的效率。测试结果表明,该电荷泵在1mW的输出功率下,效率可达到60%,而电路面积仅为0.51mm2。

A positive and negative charge pump circuit based on GSMC μ0. 18m ±9 V CMOS triple well process for LCD drivers is proposed in this paper. With a novel body effect cancellation technique based on the structure of sharing coupling capacitors charge pump,the proposed charge pump can achieve a better driving ability and efficiency on the cost of less area. Test results indicate that the proposed charge pump＇s efficiency is up to 605 under lmW output power, while the circuit area is only 0.51 mm^2.