In this paper, a basic cell for low-power and/or low-voltage operation is identified. It evidenced how different versions of cell, coined as "flipped voltage follower (FVF)" have been used in the past many applications. A detailed classification topologies derived from FVF given. addition, comprehensive list recently proposed low-voltage/low-power CMOS circuits based on Although paper has tutorial taste, some new applications are also presented and supported by set simulated experimental...

Transportation electrification has become an important issue in recent decades and the large scale deployment of electric vehicles (EVs) yet to be achieved. The smart coordination EV demand addresses improvement flexibility power systems reduces costs system investment. uncertainty drivers’ behaviour is one main problems solve obtain optimal integration EVs into systems. In this paper, optimisation algorithm coordinate charging been developed implemented using a Genetic Algorithm (GA), where...

This paper presents the design of a wireless sensor network particularly designed for remote monitoring and control industrial parameters. The article describes components, protocol deployment, aimed to accomplish constraint assure reliability low power consumption. A particular case study is presented. system consists base station, gas sensing nodes, tree-based routing scheme nodes real-time application that operates from computer mobile phone. assures safety quality measurement achieves an...

In this paper a new basic cell for low-power and/or low-voltage operation is identified. It shown that different versions of cell, called "flipped voltage follower", have been used in the past applications. New circuits using are also proposed here.

A simple and efficient low-voltage two-stage operational amplifier with Class-AB output stage is introduced. It has a large effective current boosting factor (/spl sim/50) close to 2 bandwidth enhancement. This achieved at the expense of minimum increase in circuit complexity no additional static power dissipation. Experimental verification characteristics proposed provided.

A new family of single-stage super Class-AB operational transconductance amplifiers (OTAs) suitable for low-voltage operation and low power consumption is presented. Three novel topologies are proposed featuring simplicity compactness. They based on the combination adaptive biasing techniques differential input stage nonlinear current mirrors active load that provide additional dynamic boosting. The OTAs have been fabricated in a standard 0.5-mum CMOS process. Experimental results show...

This article discusses a new experimental way to measure the I-V characteristic curve of photovoltaic (PV) generators based on dc-dc converters. The obtained results show that classical buck and boost converters are not capable reproducing whole PV single-ended primary inductance converter (SEPIC) is optimal for this application. We propose method SEPIC in parallel connection, operating an interleaved mode. gives following advantages with respect use conventional methods: 1) It allows direct...

This paper presents a wireless fault detection system for industrial motors that combines vibration, motor current and temperature analysis, thus improving the of mechanical faults. The design also considers time further possible actions, which are important early malfunctions, avoiding irreversible damage to motor. remote condition monitoring is implemented through sensor network (WSN) based on IEEE 802.15.4 standard. deployed uses beacon-enabled mode synchronize several nodes with...

Abstract The use of video games has increased significantly in the last decade. young population always been more inclined to them. However, risks addiction them are growing with access Internet and new digital devices, lower cost them, lack parental control. On other hand, a weird circumstance as COVID-19 pandemic involves weeks-long confinements, which may influence consumption. This study aims know university students’ situation Spain regarding problem described this scenario. It analyzes...

A new operational transconductance amplifier and capacitor based sinusoidal voltage controlled oscillator is presented. The transconductor uses two cross-coupled class-AB pseudo-differential pairs biased by a flipped follower, it exhibits wide range with low power consumption high linearity. has been fabricated in standard 0.8-/spl mu/m CMOS process. Experimental results show frequency tuning from 1 to 25 MHz. amplitude the nonlinear characteristic. circuit operated at 2-V supply only 1.58...

In this paper, the usefulness of several topologies DC-DC converters for measuring characteristic curves photovoltaic (PV) modules is theoretically analyzed. Eight with step-down/step-up conversion relation (Buck-Boost single inductor, CSC (Canonical Switching Cell), Cuk, SEPIC (Single-Ended Primary Inductance Converter), Zeta, Flyback, Boost-Buck-Cascaded, and Buck-Boost-Cascaded converters) are compared evaluated. This application based on property these emulating a resistor when operating...

A new experimental way to measure the I-V characteristic curve of a solar cell, module or photovoltaic generator by using Buck-Boost-Derived DC-DC converters is proposed. Theoretical analysis shows that optimal topologies for this purpose are SEPIC (Single-Ended Primary Inductance Converter) and Cuk converter. The advantages method described, results show its usefulness.

A family of tunable MOS resistors based on quasi-floating-gate (QFG) transistors biased in the triode region is analyzed this paper. From study results, a new device that outperforms previous implementations, presented. By means capacitive divider, ac component drain-to-source voltage scaled with factor alpha les 1 added to gate-to-source leading cancellation nonlinear terms. The effect resistor linearity analytically studied. Simulation results are also provided for different technologies....

A novel sensing device for fire detection in domestic environments is presented. The detector uses a combination of several sensors that not only detect smoke, but discriminate between different types smoke. This feature avoids false alarms and warns situations. Power consumption optimized both terms hardware software, providing high degree autonomy almost five years. Data gathered from the are transmitted through wireless communication to base station. low cost compact design provides wide...

This work presents the design, construction and testing of a new embedded sensor system for monitoring concrete curing. A specific mote has been implemented to withstand aggressive environment without affecting measured variables. The also includes real-time application operating from remote computer placed in central location. was done two phases: first laboratory, validate functional requirements developed devices; second on civil works evaluate features devices, such as range, robustness...

This paper presents the design of a wireless flood sensor to detect presence water on home floors, providing early warning leaks. A network has been deployed gather measurements from nodes. control central coordinates and processes data. Users can remotely inquire for water, status batteries specific node, type liquid information about its functionality alarms, thanks proprietary software application. The alerts are also communicated user within through an audible siren. designed device is...

This work presents the design, development and implementation of a smart sensor to monitor respiratory rate. is aimed at overcoming drawbacks other systems currently available in market, namely, devices that are costly, uncomfortable, difficult-to-install, provide low detection sensitivity, little-to-null patient-to-patient calibration. The device based on capacitive sensing by means an LC oscillator. Experimental results show meets necessary requirements, making feasible proposed monitoring...

Abstract This paper describes a methodology and the developed system for measuring, capturing, displaying I–V P–V characteristic curves of photovoltaic (PV) modules or arrays based on single‐ended primary inductance converters (SEPIC) in parallel connection, operating interleaved mode. The proposed allow real time capture PV panel array, show several advantages with regard to classical methods: simple structure, scalability, fast response, versatility, direct display, low cost. measuring...

The new generation of nuclear physics detectors that used to study reactions is considering the use digital pulse shape analysis techniques (DPSA) obtain (A,Z) values reaction products impinging in solid state detectors. This technique can be an important tool for selecting relevant channels at HYDE (HYbrid DEtector ball array) silicon array foreseen Low Energy Branch FAIR facility (Darmstadt, Germany). In this work we feasibility using artificial neural networks (ANNs) particle...

Open-pit mines are an important source of atmospheric particulate matter (PM) owing to the constant earth-moving and crushing. The well-known association between high PM concentrations adverse health effects has made permanent control fugitive emissions from a public concern. Nevertheless, large size these renders this task difficult expensive perform with regulatory apparatuses; subsequently, mining industry requires other technologies suitable quality/price ratio. In study, novel...

A CMOS variable gain amplifier (VGA) based on a novel linear and tunable triode transconductor is presented. The proposed employs local negative feedback for linearisation controlling the drain voltage of input transistors biased in region. new design able to operate at low supply stability guaranteed. features 47.75 dB dc 4.23 MHz unity frequency with power consumption only 91 µA. To show feasibility transconductor, VGA has been fabricated. Measurement results 0.13 µm −3 bandwidth above 2.8...