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This paper presents the design of an inductor-less low noise amplifier (LNA) using high tunable and novel active inductor in 0.18um CMOS technology. A high tunable active inductor is used instead of spiral inductor. A common source cascode amplifier with RC feedback is used in the LNA circuit topology. Input and output impedance matching is implemented by using two stages source follower circuit to...
In this paper, a 60° photonic crystal bending geometry for TM modes of a Kagome lattice is proposed. A two dimensional hexagonal array of dielectric rods with a refractive index neff =3.25 is used for this purpose. The proposed bending structure uses a tapered geometry which increases the transmission and decreases the reflected light in the waveguide. Bandwidth is defined as the region where the...
This paper present an analytical model of delay for subthreshold voltage to time converters (VTCs). The model characterizes an equation between the input voltage and output delay. Delay prediction model can be used to compute delay and understand characteristic of VTC in subthreshold region. Simulations are done in 0.18um CMOS technology and results ensure the accuracy of the model.
Design and implementation of a low-power and low-cost booth-shift/add multiplexer-based singed multiplier is presented. The main blocks of the circuit are constructed with some simple low-power structures. It includes multiplexer-based booth encoder and singed shifter blocks, multiplexer-based Manchester adder, an optimized and compact structure of control unit, and a low-power structure for full...
K-means clustering algorithm is a partition based clustering algorithm which has been widely used in data mining applications. This algorithm suffers from an issue, named initial centers selection. This problem significantly effects on the quality and running time of clustering. Several literatures discussed on this problem and try to select the best initial centers to prevent final results from getting...
We are reporting the design of a new hypersonic filter with the operating frequency of ∼ 2–7 GHz, by means of a 2D nanophononic crystal (NPnC) platform. The 2D NPnC is composed of a periodic array of infinitely long nanorods of silicon, arranged in a square lattice of constant a0=96 nm, in air background. The radii of the CMOS compatible Silicon nanorods are r0=40 nm. Mechanical waves propagating...
A new Microelectromechanical systems (MEMS) based capacitive differential pressure sensor is introduced. The capacitive differential pressure sensors have good sensitivity and robust structure while are not so much sensitive to the stress and other ambient conditions and typically have no temperature drift. Meanwhile, they respond nonlinearly to the input pressure variations and their sensitivity...
Compressors play a significant role in overall performance of multipliers and hence in efficiency of arithmetic circuits. To further improvement of multipliers higher order compressors have been considered. In this paper, two novel 5:2 compressors are presented. The proposed architectures lay emphasis on the idea of making the carry-out signal Cout2 independent of Cin1. Therefore, we have developed...
This paper proposes a new current starved ring oscillator based on current mode injection locked frequency multiplier (ILFM). This low power oscillator is the main building block of low power transceivers. These transceivers are mainly used in biomedical sensor nodes, where the consuming power is crucial. The operation frequency of the oscillator was chosen to be 500MHz. One 50MHz accurate low phase...
In this paper, we investigate the time to failure (tf) analysis of a Single Mode 1.55 μm InGaAsP vertical cavity surface emitting laser (VCSEL) with two different electrical confinement structures. The electrical confinement introduced by the oxide aperture or air-posted design are compared with conventional structure. Air-posted VCSEL shows an average of 7.43X and 19.83X Improvement in time to failure...
An analytical model for double-gate (DG) tunnel FETs (TFETs) using two-dimensional (2-D) solution of Poisson's equation is presented. We derived analytical expressions for the drain current and sub-threshold swing from the maximum electric field using the Kane model. The model is validated via comparing it with TCAD simulation results for different sets of parameters. The results show a good agreement...
In this paper, for the first time, a new graphene-based Schottky barrier solar cells consisting of InxGa1−xN with low Indium contents (x <0.45) is proposed. Then, their solar power conversion efficiency simulated and optimized using an analytical model taking into account radiative and Shockley-Read-Hall recombination. Also, the effect of the temperature and doping concentration of InxGa1−xN on...
Undoubtedly, Basic Local Alignment Search Tool is one of the most prevalent algorithms in sequence searching and bioinformatics. BLAST is an index-based approach in order to recognize an unknown string of DNA sequence and due to its high computational nature, different types of hardware configurations have been proposed. In this paper, the traditional algorithm is applied; however a new architecture...
Distributed wireless sensor networks, which are consisting of several single sensors, are becoming very popular in many important applications. This paper talks about collaborative algorithms which are implemented on WSN in order to find the location of sound source. In this paper, an algorithm is discussed for each node and a collaborative algorithm is proposed for sink node. The algorithms are designed...
Speed, power and chip area are the crucial parameters in logic circuit designs. With the gate diffusion input (GDI) technique, low power logic gates can be designed with the minimum number of transistors. In this paper the modified GDI (m-GDI) cell based on the basic GDI cell is proposed for designing the logic circuits in nano process. In the proposed GDI cell, the chip area for the pull up and pull...
Moving object tracking in a sequence of an image is one of the favorable issues in machine vision. Recently, particle filter have based developed as a powerful method in this field. Particle filter is a following method which estimates a target route in video image sequences by probability approaches. In many cases, the follower encounters with problems such as: local lighting variations or abrupt...
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