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doi: 10.7873/DATE.2015.0033
High Performance Single Supply CMOS Inverter Level up Shifter for Multi–Supply Voltages Domains
José C. García1,a, Juan A. Montiel–Nelson1,b, J. Sosa1,c and Saeid Nooshabadi2
1University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.
ajcgarcia@iuma.ulpgc.es
bmontiel@iuma.ulpgc.es
cjsosa@iuma.ulpgc.es
2Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI, USA.
saeid@mtu.edu
ABSTRACT
A single supply CMOS inverter level shifter (ssqc–ls) for upconverting signals from 0.4V–1V logic level range up to 1.1V power supply domain is introduced. For guaranteing a low energy consumption, the proposed shifter is based on topological modifications of the structure qc–level shifter reported in [1]. For 0.5V input square wave switching at 500MHz, the inverter level shifter (ssqc–ls) using 1.2V of power supply voltage achieves a 60% of Figure of Merit improvement in comparison against jy–ls [1] with a dual power supply voltage of 0.6V and 1.2V. Post–layout simulation results shown that (ssqc–ls) reaches a propagation delay of 0.75ns, an energy consumption of only 2.3pJ, and an energy–delay product of 1.73pJns for a capacitive loading condition of 950fF.
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