Abstract
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.
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