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This paper presents a level shifter circuit capable of handling extremely low-voltage inputs. The circuit has a distinctive current generation scheme using a logic error correction circuit that works by detecting the input and output logic levels. The proposed level shifter circuit can convert low-voltage digital input signals into high-voltage digital output signals. The circuit achieves low-power operation because it dissipates operating current only when the input signal changes. Measurement results demonstrated that the circuit can convert a 0.23-V input signal into a 3-V output signal. The power dissipation was 58 nW for a 0.4-V 10-kHz input pulse.
Date of Publication: July 2012