Overview of Polymer based MEMS sensors

Vol. 5  Issue 2
Year: 2015
Issue: Dec-Feb
Title: Overview of Polymer based MEMS sensors
Author Name: T. Sripriya and V. Jeyalakshmi
Synopsis:
The objective of this paper is to present an overview of polymer based sensors, and technologies used for their fabrication. In this paper, the design and fabrication of shear stress sensor, silicon based micro sensor, gas sensor, pressure sensor, polymer filled sensor and Quartz sensor are discussed. Sensors are used to detect and measure a physical property. They indicate the value being measured and are also capable of providing a proper response to any change in the measured physical value. Example of commonly used sensors include Pressure Sensor, Temperature Sensor, Gas Sensor, Humidity Sensor, etc., Microelectromechanical System based sensors are miniaturized in size and their sensing is more accurate and they have a long life.

CPW-FED Dual Band Notched Fractal Patch Antenna For UWB Applications

Vol. 5  Issue 1
Year: 2014
Issue: Sep-Nov 
Title: CPW-FED Dual Band Notched Fractal Patch Antenna For UWB Applications
Author Name: B. Divya Gayathri and S. Thulasi Prasad 
Synopsis:
Modern communication systems put demand on antennas which operate over multiple range of frequencies, within shrunken size, less weight and high gain. For wireless applications like wireless home networking, wireless USB, Ultra Wide Band (UWB) antenna plays an important role. For achieving UWB performance, a Coplanar Waveguide (CPW) fed fractal tree patch antenna is proposed. As UWB operates under a wide range of frequency band, for achieving band rejection function, a Folded T-Shaped Element (FTSE) is embedded in the radiating patch. The notch band is 3.3-4.2GHz. Simulation results shown that the antenna exhibits preferred VSWR levels in the entire impedance bandwidth. Pair of rectangular notches are included in the ground plane for extending the antenna's impedance bandwidth. The results show that the antenna covers the frequency range from 3.1-11.1 GHz with VSWR ≤ 2. Dimensions of antenna is 14 × 18 × 1mm3 .

VLSI Design Of Low Energy Modeling For Network On Chip (NoC) Applications

Vol. 5  Issue 1
Year: 2014
Issue: Sep-Nov 
Title: VLSI Design Of Low Energy Modeling For Network On Chip (NoC) Applications
Author Name: Jeeva Anusha and V. Thrimurthulu 
Synopsis:
As technology trends advances, workstation chips become increasingly parallel, and efficient communication substrate is decisive for meeting performance and energy targets. Also as nano technology shrinks day by day work station chips are migrated to SOIC – System On Integrated Chip, which leads to many challenges in the design era, and is more critical for communication applications such as Network on Chip (NoC) and also as technology shrinks, the power supply of NoC links starts to struggle with that of NoC routers. In this paper, the authors propose the use of efficient data encoding techniques as a practical way to reduce both power dissipation and energy consumption of NoC links. In this work, the authors target the core cause of network energy consumption through techniques that reduce link and router-level switching commotion. The proposed encoding techniques are simulated and verified by Xilinx tools along with Virtex – 5 FPGA board.

Design And Implementation Of Different Digital Modulation Analysis For Optical Communications

Vol. 5  Issue 1
Year: 2014
Issue: Sep-Nov 
Title: Design And Implementation Of Different Digital Modulation Analysis For Optical Communications
Author Name: M. Devarajan and A. Karikalan
Synopsis:
This paper, presents a method to describe all modulation techniques such as BPSK, ASK, FSK, QPSK, OOK. These are compared based on bandwidth requirement, power efficiency, transmission capacity and bit error probability. The modulators are the basic requirement of optical communication systems and they have been designed to reduce the channel distortion, and hence many types of modulation techniques have been proposed here. This paper, mainly focuses on the hardware realization of such several modulation schemes with a minimum area strategy for the universal mobile telecommunication system when it comes to power and error performance. Here MATLAB software is used for simulation and result analysis.

Aircraft Asylum Monitoring System Using SPARTAN6 FPGA

Vol. 5  Issue 1
Year: 2014
Issue: Sep-Nov 
Title: Aircraft Asylum Monitoring System Using SPARTAN6 FPGA
Author Name: S. N. Bhuvaneshwari, M. Elakkiyapriya and M. Shenbagapriya
Synopsis:
Aircraft provides a Fast Reliable mode of transport with no comparable alternative for long distance. This paper is used to get the information about the plane, if any accidents or hijack occurs in the plane. The jumbo level sensor used in the plane activates and gives us the digital information about the direction and distance of landing of the plane to the controller. Then the controller allows the signal from the control room to the plane. The TI OMAP in Spartan 6 FPGA used in this paper demonstrates the action in control, the braking, and nose landing gear of the plane. The magnetic sensor also activates, while the controller receives the signal, which deactivates or magnetize the weapons in the plane. This project is mainly used for the aircraft system. It has few advantages with, High safety for plane and passengers, by reducing the plane's hijack and accidents and is easy to find the plane tracking and control. It is also easy to handle the equipment. This concept has been implemented in Unified Learning Platform kit which increases the efficiency.

Review On SOI MOSFET For Low Power Digital Application

Vol. 5  Issue 1
Year: 2014
Issue: Sep-Nov 
Title: Review On SOI MOSFET For Low Power Digital Application
Author Name: Nitu Rao, Vimal Kumar Mishra and R.K. Chauhan
Synopsis:
Several Metal Oxide Semiconductor (MOS) structures are discussed in this paper namely Silicon on Insulator (SOI) MOSFET, Partially Depleted (PD) SOI MOSFET, Fully Depleted (FD) SOI MOSFET and tunnel diode body contact MOSFET. SOI MOSFET has certain advantages over conventional bulk MOSFET in terms of reduced short channel effect and drain induced barrier lowering. But SOI MOSFET has certain problems due to its buried oxide layer. So the comparative study of different SOI MOSFET over bulk MOSFET has been taken. To overcome the problem of Floating Body Effect and high series resistance different structures of FD SOI MOSFET are explained in brief. A Tunnel Diode Body Contact SOI MOSFET is also studied in this paper to overcome the problem of Floating Body Effect in PD SOI MOSFET.

Review On Tunnel SRAM For Low Power Applications

Vol. 5  Issue 1
Year: 2014
Issue: Sep-Nov 
Title: Review On Tunnel SRAM For Low Power Applications
Author Name: Alka Parihar, Vimal Kumar Mishra and R.K. Chauhan
Synopsis:
This paper presents a brief review on different types of Tunnel Static Random Access Memory that has been proposed for low power applications. Many authors and researchers have worked on tunnel SRAM, RTD/HFET low standby power, SRAM gain, cell and Bistable Body Tunnel SRAM and demonstrated the accomplished improvements in power dissipation and performance compared with previous designs for low-power memory operation. It broadly relates to SRAM cell employing a Tunnel Switched Diode (TSD) that acts as the storage medium and is controlled by a pass transistor.