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Silicon nanowires are reported for their application in bio sensing area and their potential in the detection of various biomolecules. In the present work, freestanding two-terminal Schottky-barrier silicon nanowire arrays exhibiting memristive behavior are fabricated to obtain Memristive-Biosensors. Scanning electron microscopy reveal details on the morphology of the fabricated structures. The memristive...
A new integrated differential three-level highvoltage pulser output stage to drive capacitive micromachined ultrasonic transducers (CMUTs) is proposed in this paper. A topology comparison between the new differential output stage and the most commonly used single-ended topology is performed in order to assess the performance of the new output stage. The new topology achieves a 10.9% lower power consumption...
Poly(3-hexylthiophene) (P3HT) nanofibers fabricated by self-assemby have been used as active sensing layers in chemiresistive gas sensors for acetone, ammonia and water. Their response has been compared to that of analogous devices in which P3HT was present as a plain, non-nanostructured layer. The results of this comparison show that nanofiber-based sensors have faster signal decay times and complete...
This paper presents a design of merged active SHA (sample and hold amp) and first MDAC (SMDAC) used in the first 4-bit pipeline stage of an analog-to-digital converter (ADC). A nested gain boosting technique is first used on the signal path to obtain the required resolution without increasing too much power. A constant-transconductance (constant-gm) bias circuit is designed for corner robustness and...
The number of sensor nodes being used for the applications is increasing dramatically every year. In this paper we consider LTE for sensor networks. There is little published research on resource allocation of sensor networks in LTE. Theoretical calculation carried out for mobile users in LTE was used and recreated for sensor nodes transmitting. Existing literature has carried this out for mobile...
In this paper we present a CORDIC based FPGA implementation of Singular Value Decomposition for real time tactile information processing. The design is implemented to handle an arbitrary size two dimensional sensor input matrix. Besides the accuracy of the computation, implementation results figure out a relationship between used resources/latency and input data resolution: for each additional 1 bit...
This paper analyses the bending-induced stress effects on ultra-thin cross-shaped magnetic sensors operating in voltage- or current-modes. Both the magnetic sensor's sensitivity and the offset drift have been analysed. The optimum geometry and thickness of the Hall sensor are the important parameters to be analysed to compensate any mechanical stress related effect on the performance of sensors. Numerical...
We present high-performance temperature sensors which utilize spray deposited carbon nanotube (CNT) films as the active sensing material. In order to evaluate the device performance, the change in device resistance with respect to the change in temperature is monitored. The performance of devices are compared with and without encapsulation, then for the same devices the effect of post-fabrication...
A novel, simple DC-DC concept for low-power applications is presented. We propose a predictive peak-current mode controller in discontinuous conduction mode (DCM). The design is able to operate with a minimized output capacitor of only 27nF. Measurements shows low ripple voltage even at maximum load current steps and excellent transient response at a good DC control of Vout.
In this paper, we propose enhanced wireless power transfer system based on magnetic resonance for portable electronic device charging. Resonators are designed and fabricated for efficiency improvement and miniaturization through electromagnetic simulation tools. Impedance matching technique is utilized to improve the transmission power efficiency by modulating the impedance at the transmitter end...
Technology scaling enables the Field Programmable Gate Arrays (FPGAs) provide increasing computing power while remain low power consumption. Together with the high flexibility for application design and deployment, FPGAs have become popular even in safety- and mission-critical applications. Meanwhile, Commercial Off-The-Shelf (COTS) components are often used in system design to reduce time-to-market...
New technologies such as cloud services and the Internet of Things have led to a demand for higher bandwidths, as well as the need for dynamic bandwidth allocation. This flexible bandwidth is offered by the BiPON protocol. By using BiPON, a significant power consumption reduction can be realized at the receiver side by using a 1:4 sub-sampling clock-and-data recovery circuit (CDR). To realize this...
The FinFET technology is one of the ultimate solutions for Moores Law. Since sizes of device channel shrink, several Short Channel Effects (SCEs) appear. The FinFET or Multigate are best solutions for SCEs. However, this device provides several parasitic components which may reduce the performance. The parasitic components are in form of parasitic resistance and in parasitic capacitance. Here, in...
The development of wireless sensor networks in last decade have changed the way information is collected and retrieved from the area monitoring. However, the harvesting data might be limited to more complex applications such as surveillance, object detection and tracking. For this reason, the research efforts in the field of wireless multimedia sensor networks (WMSNs) have growth rapidly so far. In...
Beamfromer forms a vital part of ultrasound imaging systems having a major share in cost, power and hardware footprint of complete system. The amount of data handled in a typical beamforming block of an ultrasound imaging system is considerably large due to substantial number of transducers. Consequently, computational power required will be huge as is the foot-print of complete system. Recently,...
A receiver channel topology for a pulsed time-of-flight (TOF) laser rangefinder is presented. The IC receiver chip realized in a 0.18 μm CMOS technology includes a transimpedance amplifier, a post amplifier and a timing comparator. Timing detection is based on leading edge detection. A multi-channel TDC is used for compensating the amplitude-dependent timing error by detecting the pulse width of the...
Dynamic Thermal Management (DTM) emerged as a solution to address the reliability challenges with thermal hotspots and unbalanced temperatures. DTM efficiency is highly affected by the accuracy of the temperature information presented to the DTM manager. This work aims to investigate the effect of inaccuracy caused by the deep sub-micron (DSM) noise during the transmission of temperature information...
This paper investigates the dominant conduction mechanisms in two bi-layer Ta2O5-Al2O3 structures fabricated by atomic layer deposition and rf sputtering. In depth experimental (electrical and optical) and theoretical analysis have been conducted to demonstrate the dominancy of quantum mechanical tunnelling, a desirable conduction mechanism for high-speed nanorectifier device operation.
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