Ultra-Low Power, Area Efficient and High-Speed Voltage Level Shifter based on Wilson Current Mirror

Abstract

Paper presents a framework of the voltage level shifter utilized in multiple supply voltage designs. The voltage level shifters are a device that converts the voltage of one level to another. At the fringes of the various voltage islands in the partition the voltage level shifters are employed to bridge the various design blocks which are working at different supply voltage. The proposed technique provides an area efficient, high momentum, and low power level shifter employing wilson current mirror voltage level shifters established on reflected output. It also eliminates the shortcoming of typical wilson current mirror level shifters in utilizing the current mirror which uses a high aspect ratio are considerably saves the power and area of the design. As compared to the existing methodologies the proposed level shifter comprises relatively fewer components all minimally categorized and further decreasing the area of the design. The proposed level shifter exceptionally works well with subthreshold input supply voltages while demonstrating significantly lesser propagation delay. Accomplished in the 7nm CMOS technology node, the post layout results uphold that the proposed sub-threshold level shifter can effectively modify the input voltage level from less than 0.45mV to around 1.5V at the output without taking on any of the multithreshold devices. The power utilization of the level shifter proposed has a 0.95V voltage input with an input frequency of 115MHz and up to 1.5V of output levels. The outcome achieved by the proposed technique has a circuit delay of 1.88 ns with an area of 1.4nm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and also produces an output power of 5.98 nW.