Ultra-Low-Power and Ultra-Low-Cost Short-Range Wireless Receivers in Nanoscale CMOS

This system provides low power consuming and low cost wireless sensor network. This system provides a real time temperature and humidity. It also gives proportional control action. This system consists of TI’s MSP430 microcontroller which consumes ultra low power and improves the overall system performance. The Sensorion’s SHT 11 sensor is used to measure temperature and humidity. Sensor SHT 11 consumes low power and gives the fully calibrated digital output. Zigbee technology is used for wireless communication. Zigbee is low power consuming transceiver module. It operates within the ISM 2.4 GHz frequency band. AT and API command modes configure module parameters. RF data rate is 250 kbps. To achieve the proportional control triac and MOC 3022 are used. The star network topology is implemented. The temperature of earth goes on increasing due to global warming, deforestation, pollution, etc. Due to this the temperature of atmosphere also increases which is harmful and dangerous for many systems. This system provides precise control of temperature and humidity in Green House, Art Galleries and Industries.

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An Analysis of a Symmetric Circuit Topology for Ultra-Low Power Voltage Scaling in Deep Nanoscale CMOS

10.18130/v3f09r ◽

2015 ◽

Author(s):

Elena Weinberg

Keyword(s):

Low Power ◽

Voltage Scaling ◽

Ultra Low Power ◽

Circuit Topology ◽

Nanoscale Cmos

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Ultra-Low-Power, High-Accuracy 434 MHz Indoor Positioning System for Smart Homes Leveraging Machine Learning Models

Entropy ◽

10.3390/e23111401 ◽

2021 ◽

Vol 23 (11) ◽

pp. 1401

Author(s):

Haq Nawaz ◽

Ahsen Tahir ◽

Nauman Ahmed ◽

Ubaid U. Fayyaz ◽

Tayyeb Mahmood ◽

...

Keyword(s):

Low Power ◽

Indoor Localization ◽

Low Cost ◽

Smart Homes ◽

Indoor Positioning ◽

High Accuracy ◽

Positioning System ◽

Telemetry Data ◽

Ultra Low Power ◽

Indoor Positioning System

Global navigation satellite systems have been used for reliable location-based services in outdoor environments. However, satellite-based systems are not suitable for indoor positioning due to low signal power inside buildings and low accuracy of 5 m. Future smart homes demand low-cost, high-accuracy and low-power indoor positioning systems that can provide accuracy of less than 5 m and enable battery operation for mobility and long-term use. We propose and implement an intelligent, highly accurate and low-power indoor positioning system for smart homes leveraging Gaussian Process Regression (GPR) model using information-theoretic gain based on reduction in differential entropy. The system is based on Time Difference of Arrival (TDOA) and uses ultra-low-power radio transceivers working at 434 MHz. The system has been deployed and tested using indoor measurements for two-dimensional (2D) positioning. In addition, the proposed system provides dual functionality with the same wireless links used for receiving telemetry data, with configurable data rates of up to 600 Kbauds. The implemented system integrates the time difference pulses obtained from the differential circuitry to determine the radio frequency (RF) transmitter node positions. The implemented system provides a high positioning accuracy of 0.68 m and 1.08 m for outdoor and indoor localization, respectively, when using GPR machine learning models, and provides telemetry data reception of 250 Kbauds. The system enables low-power battery operation with consumption of <200 mW power with ultra-low-power CC1101 radio transceivers and additional circuits with a differential amplifier. The proposed system provides low-cost, low-power and high-accuracy indoor localization and is an essential element of public well-being in future smart homes.

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Low-Cost and Ultra-Low-Power Consuming RTUs for Use in IoT Systems

International Journal of Circuits, Systems and Signal Processing ◽

10.46300/9106.2020.14.12 ◽

2020 ◽

Vol 14 ◽

Keyword(s):

Data Mining ◽

Internet Of Things ◽

Low Power ◽

Low Cost ◽

General Packet Radio Service ◽

Ultra Low Power ◽

Packet Radio

This paper presents the design and realization of low-cost and ultra-low-power consuming remote transfer units (RTUs), working as communication gateways for collecting, aggregating, and forwarding IoT data to information centers (servers) in the cloud for further processing and data mining. Two types of RTUs, targeting different application scenarios and utilizing different communication standards, were designed – one, based on the General Packet Radio Service (GPRS) standard, and another – on the NarrowBand Internet of Things (NB-IoT) standard. The developed RTUs were experimentally tested and their use was successfully demonstrated in different IoT systems.

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Low-power integrated transmitter design using frequency multiplication techniques

e & i Elektrotechnik und Informationstechnik ◽

10.1007/s00502-020-00856-z ◽

2020 ◽

Author(s):

Markus Stadelmayer ◽

Tim Schumacher ◽

Thomas Faseth ◽

Harald Pretl

Keyword(s):

Low Power ◽

Radio Frequency ◽

Short Range ◽

Cmos Process ◽

Power Demand ◽

Frequency Multiplication ◽

Ultra Low Power ◽

Third Harmonic ◽

Harmonic Extraction ◽

Transmitter Design

Abstract This paper proposes an approach to employ frequency multiplication techniques like edge-combining and third harmonic extraction in ultra-low-power integrated transmitter design. The overall power demand of the transmitter is reduced by keeping operating frequency of its components low. For that reason, edge-combining and third harmonic extraction are integrated directly into a switched mode power amplifier. Hence, the radio frequency signal is generated just before it is fed to the antenna. This leads to a reduced power demand of the overall transmitter in comparison to conventional designs where the oscillator and other components are operated directly at the radio frequency. Within this paper we propose an amplifier that generates a 2.4 GHz carrier frequency from a ring oscillator running at a low 200 MHz resulting in a frequency multiplication factor of twelve. The exemplary design is targeted to be used in ultra-low-power short range applications. Hence, our simulations using extracted layout models show that the amplifier provides an output power of approximately -12 dBm at a supply voltage of 0.6 V while consuming 2.4 mW of power fully integrated in a 180 nm 1P6M CMOS process. This demonstrates that the proposed techniques are especially suitable for ultra-low-power transmitter in short range applications. That includes medical and body area network applications.

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