A Low Power Energy-Efficient Precision CMOS Temperature Sensor †

Nowadays, signal lights are made using light-emitting diode arrays (LEDs). These devices are extremely energy efficient and have a very long lifetime. Unfortunately, especially for yellow/amber LEDs, the intensity of the light is closely related to the junction temperature. This makes it difficult to design signal lights to be used in naval, road, railway, and aeronautical sectors, capable of fully respecting national and international regulations. Furthermore, the limitations prescribed by the standards must be respected in a wide range of temperature variations. In other words, in the signaling apparatuses, a system that varies the light intensity emitted according to the operating temperature is useful/necessary. In this paper, we propose a simple and effective solution. In order to adjust the intensity of the light emitted by the LEDs, we use an LED identical to those used to emit light as a temperature sensor. The proposed system was created and tested in the laboratory. As the same device as the ones to be controlled is used as the temperature sensor, the system is very stable and easy to set up.

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Low Power and Energy Efficient Street Light System Using IoT

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1084/1/012120 ◽

2021 ◽

Vol 1084 (1) ◽

pp. 012120

Author(s):

M Srinivasan ◽

P Manojkumar ◽

A Dheepancharavarthy

Keyword(s):

Low Power ◽

Energy Efficient ◽

Light System ◽

Power And Energy

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Energy Efficiency in Short and Wide-Area IoT Technologies—A Survey

Technologies ◽

10.3390/technologies9010022 ◽

2021 ◽

Vol 9 (1) ◽

pp. 22

Author(s):

Eljona Zanaj ◽

Giuseppe Caso ◽

Luca De Nardis ◽

Alireza Mohammadpour ◽

Özgü Alay ◽

...

Keyword(s):

Energy Efficiency ◽

Internet Of Things ◽

Low Power ◽

Energy Efficient ◽

Wide Area ◽

Wide Area Networks ◽

The Internet ◽

Extensive Review ◽

Research Directions ◽

The Internet Of Things

In the last years, the Internet of Things (IoT) has emerged as a key application context in the design and evolution of technologies in the transition toward a 5G ecosystem. More and more IoT technologies have entered the market and represent important enablers in the deployment of networks of interconnected devices. As network and spatial device densities grow, energy efficiency and consumption are becoming an important aspect in analyzing the performance and suitability of different technologies. In this framework, this survey presents an extensive review of IoT technologies, including both Low-Power Short-Area Networks (LPSANs) and Low-Power Wide-Area Networks (LPWANs), from the perspective of energy efficiency and power consumption. Existing consumption models and energy efficiency mechanisms are categorized, analyzed and discussed, in order to highlight the main trends proposed in literature and standards toward achieving energy-efficient IoT networks. Current limitations and open challenges are also discussed, aiming at highlighting new possible research directions.

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Energy Efficient VLSI Based DCT Architecture with Accurate Error Compensation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.626.127 ◽

2014 ◽

Vol 626 ◽

pp. 127-135 ◽

Cited By ~ 1

Author(s):

D. Jessintha ◽

M. Kannan ◽

P.L. Srinivasan

Keyword(s):

Low Power ◽

Energy Efficient ◽

Time Complexity ◽

High Performance ◽

Low Power Consumption ◽

Distributed Arithmetic ◽

Technology Scaling ◽

Truncation Errors ◽

History Of ◽

Technology Dependency

Discrete Cosine Transform (DCT) is commonly used in image compression. In the history of DCT, a milestone was the Distributed Arithmetic (DA) technique. Due to the technology dependency a multiplier-less computation was built with DA based technique. It occupied less area but the throughput is less. Later, due to the technology scaling, multiplier based architectures can be easily adapted for low-power and high-performance architecture. Fixed width multipliers [1]-[7] reduces hardware and time complexity. In this work, Radix 4 fixed width multiplier is adapted with DCT architecture due to low power consumption and saves 30% power. In order to reduce truncation errors caused during fixed width multiplication, an estimation circuit is designed based on conditional probability theory.

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