A single-supply sub-threshold level shifter with an internal supply feedback loop for multi-voltage applications

A single-supply level shifter with an internal supply feedback loop, which can shift an input signal from the sub-threshold level to the above-threshold level, is presented in this paper. This level shifter has a wider voltage conversion, less transmission delay, higher energy efficiency, and more flexibility in the physical layout than those described in previous citations. The proposed level shifter can convert a 210-mV input signal into a 1.2-V output signal across process corners with a flexible physical layout when implemented in 65-nm LP technology. For a voltage of 0.2V, the circuit has a propagation delay of 19.4 ns, a static power dissipation of 1.84 nW, and an energy consumption per transition of 82.2 fJ for a 1-MHz input signal. Due to these excellent characteristics, the proposed design is particularly suitable for applications in multi-voltage digital systems.

[1]  Nobutaka Kuroki,et al.  A 0.19-V minimum input low energy level shifter for extremely low-voltage VLSIs , 2015, 2015 IEEE International Symposium on Circuits and Systems (ISCAS).

[2]  Marco Lanuzza,et al.  Low-Power Level Shifter for Multi-Supply Voltage Designs , 2012, IEEE Transactions on Circuits and Systems II: Express Briefs.

[3]  Reza Lotfi,et al.  A Low-Power Subthreshold to Above-Threshold Voltage Level Shifter , 2014, IEEE Transactions on Circuits and Systems II: Express Briefs.

[4]  Marco Lanuzza,et al.  Fast and Wide Range Voltage Conversion in Multisupply Voltage Designs , 2015, IEEE Transactions on Very Large Scale Integration (VLSI) Systems.

[5]  Nobutaka Kuroki,et al.  A Low-Power Level Shifter With Logic Error Correction for Extremely Low-Voltage Digital CMOS LSIs , 2012, IEEE Journal of Solid-State Circuits.

[6]  Ulrich Rückert,et al.  A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror , 2010, IEEE Transactions on Circuits and Systems II: Express Briefs.

[7]  Xin Zhang,et al.  A fast and energy-efficient level shifter with wide shifting range from sub-threshold up to I/O voltage , 2013, 2013 IEEE Asian Solid-State Circuits Conference (A-SSCC).

[8]  Stuart N. Wooters,et al.  An Energy-Efficient Subthreshold Level Converter in 130-nm CMOS , 2010, IEEE Transactions on Circuits and Systems II: Express Briefs.

[9]  Yajun Ha,et al.  A 65-nm 25.1-ns 30.7-fJ Robust Subthreshold Level Shifter With Wide Conversion Range , 2015, IEEE Transactions on Circuits and Systems II: Express Briefs.

[10]  Mohamad Sawan,et al.  A power-efficient wide-range signal level-shifter , 2015, 2015 IEEE 13th International New Circuits and Systems Conference (NEWCAS).