Ultra-Low Power Voltage Reference Achieves 21.7 ppm/°C Stability at 0.8V

Why It Matters

This research demonstrates a significant advancement in power efficiency for critical electronic components. By minimizing energy demands, such designs are crucial for extending battery life in portable devices and enabling the operation of low-power sensors and IoT devices, contributing to more sustainable electronic systems.

Key Finding

The developed voltage reference operates at an extremely low power of 23.2 nW with a supply of 0.8V and achieves a remarkable temperature stability of 21.7 ppm/°C, making it highly efficient and reliable.

Key Findings

• Achieved an average temperature coefficient of 21.7 ppm/°C after trimming.
• Demonstrated ultra-low power consumption of 23.2 nW at a supply voltage of 0.8 V.
• Exhibited a line sensitivity of 0.011 %/V and a power supply rejection ratio of -89 dB at 100 Hz.
• The design effectively cancels the non-linear temperature dependence of carrier mobility.

Research Evidence

Aim: To develop a voltage reference circuit with minimal power consumption and excellent temperature stability using a MOS-only architecture.

Method: Circuit design and simulation

Procedure: A novel voltage reference circuit was designed and simulated using the Enz-Krummenacher-Vittoz (EKV) model in 55 nm COMS technology. The design incorporates a specific current generator and a 5-bit trimmable load. The output temperature coefficient was trimmed to optimize performance.

Context: Electronic circuit design, low-power electronics

Design Principle

Optimize for minimal power consumption without compromising essential performance metrics like voltage stability.

How to Apply

When designing power-sensitive electronic systems, explore circuit topologies that minimize quiescent current and leakage, and consider trimming strategies for fine-tuning performance parameters.

Limitations

The performance is dependent on the specific 55 nm COMS technology used for simulation; real-world implementation may vary. Trimming adds a manufacturing step.

Student Guide (IB Design Technology)

Simple Explanation: This study created a tiny electronic component that provides a stable electrical voltage but uses almost no power, making devices last much longer on batteries.

Why This Matters: Understanding how to achieve low power consumption and high stability is crucial for designing efficient and reliable electronic products, especially for portable and embedded applications.

Critical Thinking: What are the potential trade-offs in terms of circuit complexity and cost when aiming for such extreme power efficiency?

IA-Ready Paragraph: The development of ultra-low power voltage references, as demonstrated by Wang et al. (2023), highlights the critical need for energy efficiency in modern electronics. Their work achieved a power consumption of merely 23.2 nW at 0.8V while maintaining a temperature coefficient of 21.7 ppm/°C, offering a benchmark for sustainable electronic design.

Project Tips

• When designing power-sensitive circuits, research existing ultra-low power architectures.
• Consider how environmental factors like temperature can affect component performance and explore methods to mitigate these effects.

How to Use in IA

• Reference this study when discussing the importance of power efficiency in electronic design projects.
• Use the findings to justify design choices aimed at reducing energy consumption.

Examiner Tips

• Ensure that any claims about power reduction are supported by clear data and context.
• Discuss the trade-offs between power consumption, stability, and complexity in your design choices.

Independent Variable: Supply voltage, temperature

Dependent Variable: Power consumption, output voltage temperature coefficient, line sensitivity, power supply rejection ratio

Controlled Variables: Circuit topology, technology node (55 nm COMS), current generator design, load configuration

Strengths

• Demonstrates a significant reduction in power consumption.
• Achieves high temperature stability through innovative design and trimming.

Critical Questions

• How does the EKV model contribute to the design insights compared to other models?
• What are the implications of using a MOS-only design for component selection and manufacturing?

Extended Essay Application

• This research can inform the design of power management units for energy harvesting systems.
• It provides a foundation for developing ultra-low power microcontrollers and sensor nodes.

Source

A Sub-1-V Nanopower MOS-Only Voltage Reference · Preprints.org · 2023 · 10.20944/preprints202312.2343.v1