A Floating High-Voltage Level Shifter Used in A Pre-charge Circuit for Large-size AMOLED Displays

In this paper, we propose a floating high-voltage level shifter without static power consumption which is used in a pre-charge circuit for large-size active matrix organic light emitting diode (AMOLED) displays. The proposed level shifter is a high voltage tolerant level shifter with only middle-voltage transistors which operate within the voltage limits. No high voltage transistors make it occupy less silicon areas. In addition, the proposed level shifter can achieve floating shift behavior without the threshold loss suffered by the conventional high voltage level shifter. The circuit is simulated in 0.18um CMOS process through Cadence. We analyze the circuit over different process corners and the simulation results show a rising time of 2.13ns and a falling time of 1.58ns typically.CPCI-S(ISTP)ffangyang@sina.cn267-27