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In order to solve defect detection problem of small-size solder ball in the high density chip, the method based on the pulsed eddy current thermal imaging technology (ECPT) was put forward to study the solder ball defects. With establishing 3D induction heating finite element model, the defects such as cracks, voids can be distinguished by comparing the different temperature field. Furthermore, the...
Functional verification is one of the key problems hindering successful design of large and complex hardware. As the base of functional verification, summary and decomposition of function points are leak-prone due to lack of standard language to abstract function points from specification. In this paper, we propose a function abstraction language, FAL, which is used for describing function points...
Among power generation, transmission and use, distribution is an extremely important link. The distribution system includes a transformer and a variety of high and low voltage electrical equipment, the circuit breaker is a large amount of electrical appliances. The circuit breaker can be used to distribute electric energy, the asynchronous motor is not frequently started and the power line and motor...
This paper proposes an asynchronous cycle circuit by providing Click element and joint module rather than clock-domain. The asynchronous mode of operation re-uses the simple asynchronous control protocols, takes full advantage of characteristics of Click, and commendably inherits the elasticity of the asynchronous micropipeline. The circuit in this paper has some individual coin. As a result, we can...
Modular multiplication, addition, and subtraction being the core operation of Elliptic curve public(ECC) system, the decrease of area and the merging of structure have been a hot topic in recent years. This paper first analyzes the difference between multiplication type and addition type of modular multiplier. Then, Combined with the structural characteristics of the modular adder, and mixing modular...
The degradation mechanism of 808 nm GaAs-based high-power laser diode bars (LDBs) which has 47 single laser diodes is investigated using infrared thermography, focused ion beam, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy techniques. We obtained the temperature distribution of the output facet and the results indicate that emitter 24, which is located...
Present research work propose the design of a low energy and high throughput, hierarchical clustering based routing protocol for smart home sensor network application. Proposed protocol perform dynamic cluster head selection based on multiple node characteristics like node residual energy, node distance from sink and node average distance from neighbour nodes. Cluster head distribution is even and...
The iterative property of inverse butterfly permutation network makes it possible to implement shift operation with simple routing algorithm, which has high application value in cryptography, digital image processing and other fields. Based on the inverse butterfly network, this paper proposes a subword shift unit, which integrates the operations of subword rotation shift, subword logical shift and...
A kind of LLC resonant converter with voltage-doubling rectifier technology is studied in this paper. The converter has not only a general LLC half-bridge resonant converter being easy to obtain ZVS for primary side switches and ZCS for secondary side diodes, a high efficiency of this topology, but also advantages that the transformer structure is simple in which one winding is involved on its secondary...
A new quad band quadrature branch line coupler (BLC) has been presented in this paper. The proposed BLC has been designed with the help of the T shaped coupled line sections, quad band impedance inverter. The BLC has been designed using Advanced Design System (ADS) software for f1 = 0.66 GHz, f2 = 1.52 GHz, f3 = 2.57 GHz and f4 = 3.44 GHz operating frequencies. The Rogers 5870 substrate has been selected...
Electrochemical reaction is the reason of smart meters failure under maritime climate coastal southeastern China. In order to ensure the smart meter runs reliable and stable under this kind of environment, the paper researches three anti-technology based on an analysis of the electrochemical reaction principle, combined with the specific circumstances of meter. In this paper, it analysis the core...
As the air bearing flying height (a few nanometer levels) and the deformation of suspensions (micro-or millimeter level) run at two different scales, a dual-scale model for head disk interface (HDIs) has been proposed to analyze the unloading behavior of a subambient pressure slider. With the scheme developed, the unloading process can be simulated efficiently. The nonlinear vibrations of the air...
Energy efficiency is at the heart of the EU's Europe 2020 Strategy for smart, sustainable and inclusive growth and of the transition to a resource efficient economy. Energy efficiency is one of the most cost effective ways to enhance security of energy supply, and to reduce emissions of greenhouse gases and other pollutants. Nowadays intelligent home energy management is an approach to build centralized...
The current reckoning method is based on the system operation network and modeling to achieve current reckoning network model, using the link reckoning technique and branch current measurement to identification and calculation. Analysis current difference identification features, to identify bad data, then correct the bad data, on the basis of the revised branch current to determine the state changes...
A filterless digital audio class-D amplifier (CDA) based on grow-Left double-edge (GLDE) pulse width modulation (PWM) is proposed in this paper. It consists of a high performance fully-digital uniform-sampling PWM (UPWM) modulator and a bridge-tied-load (BTL) power stage. Due to adopt the ternary PWM modulation scheme, the filterless solution without LC low-pass filter becomes possible. Finally, the...
Failure location and mechanism analysis about a microsystem fault is presented in this work. The fault phenomenon of abnormal low output power amplitude appears only at low temperature during thermal cycle test. A series of analysis including internal fault location and replacing parts for validation help to find the fault origin: a line winding inductor. The failure mechanism of the failed inductor...
This paper provides a comprehensive treatment of the design techniques of all-digital time integrators for time-mode signal processing (TMSP). A detailed examination of the principle, circuit implementation, operation, constraints, and limitations of time adders constructed from switched delay units (SDUs), dual discharge paths (DDP), and unidirectional gated delay lines (UDGDLs) is provided. It is...
This paper presents a particle filter processor IC for fingerprinting-based positioning in mobile communication systems. The proposed particle filter improves the positioning accuracy from algorithmic and architectural perspectives. For the algorithmic perspective, the proposed particle filter solves the bottleneck of large information exchange of particles by proposing a threshold IMH resampling...
This paper presents a partition level floorplan method for physical design of digital integrated circuit, which based on data flow analysis. It uses Cadence company P&R tool innovus to make floorplan, and takes a X86 CPU's south bridge design for example to introduce how to use this method to guide floorplan in detail. This method is more effective to improve the quality of floorplan for advanced...
In this work, the device structure of the mesa-type GaAs:Te blocked-impurity-band detector was designed. The fabrication processes were presented briefly, and optimization of the fabrication processes was investigated. A 3-micron-thick SiO2 film was deposited as resist to substitute for photoresist in the 50-micron-deep mesa etching process. In addition, a bi-layer photoresist lithography technique...
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