Robust and Reliable Energy-Efficient Level Shifter

Also Available Domains Nano Technology|Low Power VLSI

Project Code :TVMABE340

Objective

The objective of this work is to design a robust and energy-efficient level shifter that reliably converts low-voltage logic signals to higher voltage levels with minimal power consumption and reduced delay. The design aims to achieve high performance, noise immunity, and process variation tolerance while maintaining stable operation across wide voltage ranges, making it suitable for low-power and multi-voltage VLSI systems.

Abstract

The project titled Robust and Reliable Energy-Efficient Level Shifter presents a novel low-power and high-speed level shifter design suitable for multi-voltage and ultra-low-power applications. The proposed circuit employs a two-stage architecture consisting of a Current Mirror-Based Level Shifter (CMLS) followed by a Split-Control Inverter (SCI) to achieve efficient voltage conversion from sub-threshold to super-threshold levels. A feedback path and a current-limiter PMOS are incorporated to minimize static and short-circuit currents, while a pass transistor replaces the input inverter to reduce propagation delay and power consumption. The use of multi-threshold MOSFETs enhances performance and leakage control across process, voltage, and temperature variations. Post-layout simulations in nm technologies show excellent results, achieving low propagation delay (0.67 ns), minimal static power (280 pW), and high energy efficiency. This design provides a robust, compact, and reliable solution for voltage level translation in modern low-power SoC, IoT, and mixed-signal VLSI applications

KEYWORDS: Cross-coupled, current-mirror, energy efficiency, level shifter, standard cells, ultra-low voltage

NOTE: Without the concern of our team, please don't submit to the college. This Abstract varies based on student requirements.

Specifications

· Tool Used: Cadence EDA tools for schematic and simulation

· Design Elements: Robust and Reliable Energy-Efficient Level Shifter uses a two-stage design combining a current mirror and split-control inverter for efficient voltage conversion. It includes a feedback path to eliminate static power and improve stability during switching. A current-limiter PMOS reduces short-circuit current and power dissipation. A pass transistor replaces the input inverter, minimizing delay and energy loss. The design uses multi-threshold devices for optimized performance and leakage control.It is implemented in nm technologies, ensuring low power, high speed, and compact layout.

Learning Outcomes

· Gained understanding of level shifter circuits and their role in multi-voltage digital systems.

·Learned how to design a two-stage level shifter using current mirror and split-control inverter techniques.

· Understood methods to reduce power dissipation using feedback and current-limiting transistors.

· Developed knowledge of multi-threshold (multi-VT) MOSFET design for low-leakage and high-speed operation.

· Learned to perform post-layout simulations and analyze PVT (Process, Voltage, Temperature) variations.

Demo Video

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Front End Domains

Cadence EDA
Finite State Machines
Arithmetic Core
DSP Core
Communications
Nano Technology
Testing

Back End Domains

Nano Technology
Cadence EDA
Low Power VLSI
Core Memories
Transistor Logic

Tools

FPGA
H-Spice
Cadence EDA
QCA
Xilinx Vivado
Xilinx ISE
Tanner EDA
LT-Spice

Others

Matlab Interfacing

H-Spice

LT-Spice