K. Vasanth ¹, A. A. F. Kavirajan ², T. Ravi ², Nirmal Raj ¹

Affiliations
1 Department of E.E.E, Sathyabama University, Chennai-119, Tamil Nadu, IN
2 Department of E.C.E, Sathyabama University, Chennai-119, Tamil Nadu, IN

Abstract

The need for an optimized area, speed and power plays a vital role for any median filter is good at removing impulse noise without degrading the image details. The main operation of the median is Rank ordering. It is a computationally complex operation, so it is hard to implement it in real time. This paper introduces a new sorting technique called for Snake like sorting. The proposed Sorting technique is implemented as a parallel architecture. This algorithm is a Mesh based sorting that require less number of comparators for rank ordering. The proposed architecture is compared with other Rank Ordering algorithm on the basis of power, speed, and area and found to exhibit good results. The proposed architecture is implemented on parallel and pipelined schemes and is targeted for Spartan 3e Device with gate capacity 5000 using Xilinx 7.1i compiler version. The pipelined scheme has an operating frequency of 81 Mhz occupying 283 slices with a gate count of 5,640.

Keywords

Borrow Look Ahead Select Comparator, Median Filter, Modified Shear Sorting, Salt And Pepper Noise

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M. Pushpavalli ¹, P. Abirami ¹, K. Vasanth ¹

Affiliations
1 EEE Department, Sathyabama University, Chennai, Tamil Nadu, IN

Abstract

This paper proposes a novel closed loop control of Negative output KY boost converter using fuzzy logic. The power circuit consists of a capacitor and a diode in addition to the conventional boost converter circuit. The controller implemented the fuzzy logic to fuzzify the change in voltage with the reference voltage in order to obtain reduced output ripple, improved efficiency and fast settling time. The Proposed controller exhibits better performance than its closed loop counterparts such as PI and PID controllers. The simulation result illustrates that the output voltage ripple is reduced from 103mV to 3 mV and also the settling time is improved from 30ms to 15ms .It enhances the output power from 36 watts to 59.21 watts in load variations and 474 watts to 987 watts in line variations phenomenon. The Hardware development was also developed for the same and the performance was observed.

Keywords

Fuzzy Logic Controller, Negative KY Boost Converter, PID Controller

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