Optimizing Energy/Current Fluctuation of RF-Powered Secure Adiabatic Logic for IoT Devices

Area of Science:

• Electrical Engineering
• Computer Engineering
• Microelectronics

Background:

• Internet of Things (IoT) devices face challenges with high energy consumption and security vulnerabilities.
• Adiabatic logic circuits offer a solution for energy efficiency and enhanced security in battery-powered IoT applications.
• Harvested RF power can directly supply adiabatic logic circuits, but requires specific biasing techniques.

Purpose of the Study:

• To propose a novel adiabatic logic circuit design for low power consumption in IoT devices.
• To optimize energy and current fluctuations for improved security against power analysis attacks.
• To demonstrate the effectiveness of the design under various operating conditions and load capacitances.

Main Methods:

• A novel adiabatic logic circuit design is proposed, focusing on uniform and complementary current flow.
• A diode-connected MOS transistor-based voltage doubler is used for pMOS biasing.
• The circuit's performance is evaluated under different clock frequencies and load capacitances (50 fF, 100 fF).
• An ultrasonic transmitter circuit within a LoRaWAN network is implemented as an application example.

Main Results:

• The proposed adiabatic logic circuit demonstrates lower energy and current fluctuations compared to conventional designs.
• Improved security against power analysis attacks is achieved through uniform current flow.
• Lower power dissipation is observed, particularly at load capacitances of 50 fF and 100 fF.
• The implemented LoRaWAN ultrasonic transmitter showcases practical application in long-range communication systems.

Conclusions:

• The novel adiabatic logic design effectively reduces power consumption and enhances security for IoT devices.
• The design's optimization of current flow contributes to improved energy efficiency and robustness against attacks.
• The successful implementation in a LoRaWAN system highlights its potential for real-world IoT applications.