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In Gradient-Based Cross-Spectral Stereo Matching (GB-CSSM) output disparity maps tend to produce coarse results that are, for the most part, reliable. However, general methods of improving the performance of disparity maps generated from the Cross-Spectral comparison of visual and full infrared input images are non-existent. In particular, previous works fail to address the role and interaction of...
This paper introduces a new design method of discrete-time fractional-order PIλ controllers. It is based on using an exact discretization method that always guarantees the implementation of 3rd-order, minimum-phase, and stable discrete-time controllers. The structure of the controller can be considered as an adaptive one since it only depends on the order of the controller, which is one of three tuning...
This paper proposes implementing an antenna operating in the millimeter wave band of 56–64 GHz on the backside of an Integrated Circuit (IC) that uses Through Silicon Via (TSV) technology for a System in Package (SiP) approach to mixed signal design. A folded monopole antenna that utilizes a coaxial TSV feed line is selected to implement the design on the backside of the silicon die. Furthermore,...
Smart home scheduling, as one of the most effective techniques in Demand Side Management (DSM), is now attracting more and more research interests in the recent years. In this paper we propose an efficient scheduling algorithm for smart home resident to reduce the monetary cost of the electricity. The proposed algorithm is an improved particle swarm optimization(PSO) algorithm that can schedule the...
Distributed on-chip low dropout (LDO) voltage regulators have become common due to the increasing number of on-chip voltage domains, dynamic voltage scaling, and the need for high quality power. Due to the current limitations of on-chip LDOs, hundreds of these regulators are required to deliver high quality power within modern high performance microprocessors. As the number of parallel connected LDOs...
This paper investigates a class of electrical generators based on capacitors and diodes, with two capacitors being variable. Their main characteristics are a symmetrical structure and that they produce two outputs with the same polarity. The simplest version is analyzed in more detail, although in an approximate way, and generalizations of it are obtained, identified with a particular form of two-phase...
Selfdischarge characteristics of supercapacitors play a significant role in their sizing and power management. Furthermore, supercapacitor-s' selfdischarge, defined as no load voltage drop, is directly proportional to its charging rate. The paper proposes a framework to empirically model the terminal voltage response of supercapacitors during charge and selfdischarge. A set of empirical formulae has...
In this paper, we present a multi-string LED driver which is capable of driving five parallel LED strings with two series LEDs in each string. The current in the LED strings is regulated using a boost converter with a hysteretic control loop. Accurate current matching is achieved using a regulated cascode current mirror architecture. The loser-take-all circuit enables dynamic cancellation of LED forward...
This paper presents a method for calculating the semiconductor losses in asynchronous and synchronous PWM buck converters when operated as a fixed-VI, fixed-RL, variable-Vo dynamic power supply. Equations are derived for MOSFET switching and conduction losses in both circuits, as well as diode conduction and forward-voltage losses. This work also compares the two topologies from the perspective of...
This paper proposes a new strategy for vibration harvesting using piezoelectric material. This work relies on an adaptation of the classical Synchronous Electrical Charge Extraction (SECE). Instead of harvesting the energy at every displacement extremum, we choose to wait a certain number of extremum before harvesting the accumulated energy. This technique extends the harvested power compared to SECE,...
Efficient use of electric energy by users is one of the critical ways for increasing energy efficiency, reducing cost of power generation and supply, and environmental concerns. As part of remedial measures to address issues of energy use, many technologies for demand reduction ranging from energy saving devices through a variety of energy management systems have emerged to help users manage and control...
Wireless transceivers for biomedical implants suffer from low coupling coefficients and variations due to misalignment. This paper introduces concentric helical coils for wireless power transmission in implantable devices. The transmitter coil can be implemented in any continuous circle form, such as a bracelet, an arm cuff, or a collar. It is shown that this structure produces a high coupling coefficient...
A Nano plasmonic biosensor is composed of metallic nanoparticles on a dielectric substrate. In a certain wavelength of the incident light, these metallic nanoparticles create a strong localized electric field that is extremely sensitive to an adjacent material, creating a highly sensitive sensor. Producing a higher electric field results in a more sensitive sensor for detection of biomolecules. In...
In this paper, an low power CMOS temperature sensor for implantable applications is implemented in a 0.18 μm CMOS process. Sensors for implantable devices must have sub-μW power consumption to avoid tissue overheating. Thus, this temperature sensor employs subthreshold MOS transistors as the sensing element to reduce power consumption and enable minimum supply voltage. Temperature is converted to...
Efficient and smart techniques for analog data acquisition and processing may play crucial role in the design of miniature wearable devices, meant to continuously record, process and wirelessly transmit vital physiological parameters for real time health monitoring. In this work we propose a low-power, all-analog processing unit for an MPG (magneto-plethysmograph) based wearable device, which is meant...
We treat the design problem of second-degree IIR digital differentiators. The design problem (cost function) is formulated in the quadratic form without any frequency sampling. Since the cost function is the quadratic form, the solution is unique and the optimization scheme does not require any recursive optimization. Hence, the procedure of the design for the second-degree differentiators is very...
In this paper, two new two-dimensional (2-D) IIR and FIR filter architectures possessing quadrantal and octagonal symmetries are proposed. Furthermore, the theoretical error analysis for the proposed filters is also presented. Utilizing the presented error analysis, user can decide the bit width of the filters with satisfactory error tolerance.
In this paper, a technique for estimating frequency and amplitude of noncircular complex sinusoid has been presented. A cascade scheme of first-order complex notch filters has been introduced where complex sequence with negative frequency is rejected in the first section and sequence with positive frequency is removed in the second section. Closed-form expressions for bias and mean square error (MSE)...
Low delay maximally flat in passband and equiripple in stopband (MFER) FIR Digital Differentiators (DDs) are known to have high differential accuracy with low delay. The transfer function is defined as the subtraction of the stopband function from the passband function. The passband function and the stopband function realizes flatness characteristics and equiripple characteristics, respectively. However,...
Lattice-based cryptography has been widely researched due to its quantum attack resistance and versatility, but a practical hardware implementation that is suitable for constrained devices is still challenging. In this paper, a novel area-optimized Ring-LWE (Learning with Error) cryptographic processor is proposed. Effective structures are presented to solve the huge circuit consumption of high precision...
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