Sub Threshold Level Shifters and Level Shifter with LEC for LSI’s
J. Chaitanya Varma1, R. Ramana Reddy2, D. Rama Devi3
1J. Chaitanya Varma, Department of E.C.E, M.V.G.R College of Engineering, Vizianagaram, India.
2Dr. R. Ramana Reddy, Department of E.C.E, M.V.G.R College of Engineering, Vizianagaram, India.
3Mrs. D. Rama Devi, Department of E.C.E, M.V.G.R College of Engineering, Vizianagaram, India.
Manuscript received on November 22, 2014. | Revised Manuscript received on December 06, 2014. | Manuscript published on December 30, 2014. | PP: 173-176 | Volume-4 Issue-2, December 2014. | Retrieval Number: B3658124214/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Wide-range level shifters play critical roles in ultralow-voltage circuits and systems. In this paper level shifter circuits that are capable of converting subthreshold to above threshold signal levels are presented. Level shifters are designed using current mirrors. 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 to high-voltage digital output signals. The circuit achieves low-power operation because it dissipates operating current only when the input signal changes. Simulations are carried out using Mentor Graphics 130-nm technology. Performances of the proposed level shifters are compared in terms of delay, power consumption and duty cycle.
Keywords: Level Shifters, Current mirrors, Logic Error Correction Circuit, Mentor Graphics.