This paper presents design and application of a
level shifter circuit which works with a single power
supply. Unlike the conventional level shifter circuits,
the proposed level shifter can shift any voltage level
signal to a desired higher level without any leakage
current. Use of single supply level shifter greatly
reduces the supply routing and layout congestion
within the chip when level shifting is required between
different voltage domains. It also reduces pin count if
level shifting is required between two or more chips
operating at different supply voltages in a multivoltage
system. The proposed circuit is generic in
nature and the voltage range at which level shifting can
be done is limited by the technology only. The circuits
was designed in 90nm CMOS technology and
simulated in SPICE. The simulation results show that
the proposed level shifter circuit is able to shift the
input signal from 1.2V to 2.5V at maximum frequency
of 500MHz.