The level shifters (LSs) are the most significant interfacing circuits in multi-supply mixed-signal systems. This letter presents a high-speed and energy-efficient voltage level shifter with wide-range conversion from sub-threshold to I/O voltage. The proposed level shifter with split-control output driver significantly enhances the speed, energy and static power performance. The proposed LS is implemented in 0.18 \(\upmu \)m CMOS technology, and simulation results confirm that it efficiently converts sub-threshold input voltage (240 mV) to nominal output voltage (1.8 V) without employing multi-threshold devices. The proposed LS exhibits delay of 6.43 ns and energy/transition of 38.39 fJ with significantly low switching current for 0.4 V/1 MHz input signal and 1.8 V output level.

电平转换器（LSs）是多电源混合信号系统中最重要的接口电路。这封信提出了一种高速，高能效的电压电平转换器，具有从亚阈值到I / O电压的宽范围转换。拟议的具有分离控制输出驱动器的电平转换器大大提高了速度，能量和静态功率性能。拟议的LS是在 0.18μmCMOS技术中实现的，仿真结果证实，它无需使用多阈值器件即可有效地将亚阈值输入电压（240 mV）转换为标称输出电压（1.8 V）。拟议的LS表现出6.43 ns的延迟和38.39 fJ的能量/跃迁，对于0.4 V / 1 MHz输入信号和1.8 V输出电平，开关电流非常低。