The proposed work presents a High speed 14-bit 125MS/s successive-approximation-register asynchronous analog-to-digital-converter (SAR-ADC). A novel-based Dual-Split-Array-Three-Section (DSATS) capacitor DAC (DSATS-CDAC) is employed to increase the linearity and energy efficiency of the digital-to-analog converter (DAC), additional advantage of this work is that, the area is reduced by 59.76% of conventional design. The proposed switching technique of the (DSATS-CDAC) consumes less switching energy. Additionally, bootstrap switching is employed to ensure improved linearity and reduced power consumption.in order to enhance the speed of operation and increase the precision a preamplifier latch based comparator is implemented with the delay of 250ps. The proposed SAR-ADC prototype is implemented in a 90nm CMOS process and consumes a power of 42.8mW at 1V operating supply. The proposed design achieves a figure of merit (FOM) of 37.43 fJ/conversion-step, signal-to-noise-ratio (SNR) of 81 dB, and an effective-number-of-bits (ENOB) of 13.16 bits with a sampling rate of 125MS/s.

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In this paper, The dissertation deals with the restoration techniques in Image Processing. Tychonoff Regularization method is one of the well known techniques followed in the last two decades. Recently the topological optimization has received the attention of many researchers in the recent past. More surprisingly, Image restoration and segmentation are achieved simultaneously with the help of topological gradient. In this method, the value of the diffusivity C in the smooth regions, the number of holes drilled in each iteration and the total numbers of holes are the main controlling parameters. A complete Mat lab code has been developed to implement our method. step 1 and 2 will give a brief history of Image Restoration techniques and step 3 will deal with topological optimization techniques and step 4 will discuss the implementation.

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A compact Printed Log-Periodic Curvilinear Monopole Array (PLPCMA) antenna having a Defected Ground Plane (DGP) is proposed and examined. The proposed array of curvilinear monopoles is designed on a FR-4 substrate having a dielectric constant of 4.4. The designed antenna is multi-band operated having its resonance in the regions of S band (2GHz to 4GHz), X band (8GHz to 12GHz) and C band (4GHz to 8GHz). The design reveals Voltage Standing Wave Ratio (VSWR) lesser than 1.5 has been achieved at resonating frequencies 2.49GHz, 3.28GHz, 6.84GHz and 8.36GHz with fractional bandwidth of 4.02, 3.66, 50.58 and 41.39 percentages respectively. The presented antenna exhibits unidirectional end-fire radiation pattern with peak realized gain of 7. 1145dBi.The measured results depicts that PLPCMA antenna has good -10dB impedance bandwidth of 158% from 1.58GHz to 15GHz (9.49:1) and suits for Wi-Fi/WIMAX UWB applications.