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Low-cost, low-power, and high-sensitivity System-on-Chip (SoC) Hall Effect sensors for 0.18μm and 0.13μm technologies and beyond are developed in this work. A best-inclass current-related sensitivity Si of 418 V/A∗T is achieved by a Hall device with an area of 42 μm × 42 μm. Small offset voltage ranges within +/−1.05 mV, as well as excellent sensor reliability, are demonstrated. The Hall sensors are...
This paper proposes the application of advanced modelling and control strategies for a single phase Dual Active Bridge (DAB) based Medium Voltage DC (MVDC) Shipboard Power System (SPS). In these systems the tightly controlled point of load (POL) converters exhibit a constant power load (CPL) behaviour, which has a destabilising effect on the bus voltage. In this work, a Multiple Input Single Output...
The hybrid layer based on poly-3,4-ethylene-dioxythiophene(PEDOT)-multi-walled carbon nanotubes (CNTs) on the flexible polymer substrate is proposed as sensitive element to creation of humidity sensor. The current-voltage characteristics of the obtained films have been studied. It is shown that increasing of the content of carbon nanotubes in the composite leads to decreasing of the resistance of...
Modern systems of traditional and alternative energy, transport systems include powerful uninterruptible power supplies (UPS), implemented on batteries of charged electrochemical current sources — accumulators. These modules ensure the functioning of the systems in case of accidents or technological failures in the operation of main power supplies. The ability to provide the given energy modes by...
To meet the requirements of flexible and wearable electronic devices, strain sensors with high sensitivity, stretchability and reliability are essential prerequisite. In this work, we developed a strain sensor of resistance type, which is composed of standing multi-walled carbon nanotube (MWCNT) network, reinforced by PDMS film. Benefiting from the standing MWCNT network structure, the strain sensors...
Graphene based polyvinylidene fluoride (PVDF) composite films have been produced and characterized in order to investigate their piezo-resistive properties. To this purpose, a new production process has been developed, with the aim of fabricating at low cost PVDF films filled with graphene nanoplatelets (GNPs). The produced films, having a GNP content of 1.5%wt and 2% wt, have been characterized from...
Abstract-Design of high-performance continuous- time filter (CTF) for analogue signal processing is presented in this paper. To demonstrate of using a novel voltage-mode multiple-loop feedback (MLF) approach for CTF design, a 5th-order elliptic lowpass filter (LPF) is implemented in a standard 0.18-µm CMOS technology. The LPF is based on an inverse-follow-the-leader feedback structure with an input...
In this paper, a positioning method of distributed power system is proposed to minimize average voltage variation of DC microgrid through voltage sensitivity. Power flow analysis is performed to derive voltage sensitivity, and droop bus is introduced to improve the accuracy of voltage sensitivity. In addition, the averaged voltage sensitivity according to the position of the distributed power system...
The application features of digital potentiometers as controlled elements for the tasks of setting active RC-filters in the structure of communication systems analog interface and automatic control are considered. The research paper is based on a selected method of parameters for setting circuits with digital potentiometers providing necessary precision and setting ranges. The sections contain examples...
This paper presents a clock-less digital pulse stretcher which takes a short pulse as input and produces a detectable pulse that is longer than a required minimum duration. The proposed structure has high sensitivity to input pulse width and height and is capable of detecting deep sub-nanosecond pulses. This enables a wide variety of applications ranging from characterization of radiation-induced...
An improved Nauta transconductor, with output resistance for differential-mode output signals insensitive to process and tuning voltage variations, is presented in this paper. Comparing with the classical Nauta transconductor, the proposed transconductor introduces 4 auxiliary inverters only. It can increase the differential-mode output resistance, and keep the common-mode output resistance nearly...
This paper addresses the method for total parameters identification in speed sensorless induction motor drives. By total parameters identification, it means that all the inverse-Γ circuit parameters are poorly known and need to be identified. Based on the parameter sensitivity, an alternating-current (AC) signal of medium frequency (25 Hz) is superimposed onto the stator magnetizing current, so that...
This study focused on developing a hydrogen sulfide (H2S) gas microsensor using nanometal oxides of copper oxide-doped tin dioxide. Electrospinning and high-temperature calcination were adopted to fabricate a high-surface area and porous hollow nanofibrous gas sensing film. The film that served as a sensing mechanism on the heterojunction of the microsensor exhibited a high resistance change rate;...
There is an increasing interest in the use of soft technologies for robotic application, however, the lack of advanced sensory motor capabilities is currently a significant limitation. Sensing of soft robots, in particular, is still not fully understood and methods by which a large deformable continuum body can be effectively sensed without loosing the intrinsic soft body dynamics are limited. This...
Detection of open live conductors is a challenging task in the power system operation since it acts as a high impedance fault. High impendence faults (HIF) characteristically has a very low current value which is often not detectable using conventional over current protection devices. Several methods of detecting these HIF have been put forward. These methods involve spectral analysis of currents,...
We describe an ultra-low-power volatile compounds microsensor array towards increased selectivity and sensitivity. The chemiresistive transducers are 100 nm-thick interdigitated gold microelectrodes coated with polypyrrole-based polymer. Two sensors arrays were implemented with respectively 3 × 3 and 2 × 2 pixels2, showing a surface per pixel down to 400 × 200 μm2. The fabrication is fully CMOS-compatible...
Hardware based hash functions might provide a low cost and low power alternative to the classic solutions, which are based on implementations of mathematical cryptographic algorithms. In this paper, we propose MemHash, a hardware secure hash function built using memristive technology that exploits the unique properties of memristors. The MemHash operation is based on intrinsic device characteristics...
This paper reports a low-cost liquid-wetting-solid strategy to fabricate flexible pressure sensors. To demonstrate this strategy, a flexible sensor based on salt solution wetting conducting sponge was fabricated, and its sensing properties for detection of static pressure and vibration were investigated. It is found that this sensor not only can detect static loads, but also can detect vibrations...
This paper presents a second-order bandpass active filter that operates in current-mode. The circuit is implemented from second generation current controlled conveyors with different polarization and grounded capacitors. The proposed filter, implemented in BiCMOS technology, exhibits: a simple structure thanks to the simplified conveyors topologies; low active and passive sensitivities; a low supply...
In this presentation we introduce a robust technique for the design and optimization of the on-state resistance and breakdown voltages in power transistors, including high-electron mobility transistors (HEMTs), metal-oxide-semiconductor (MOS) power devices, insolated-gate bipolar transistors (IGBTs), and power rectifying diodes. The technique is based on the formalism of doping sensitivity functions...
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