Electronically Tunable Current-mode Multiphase Sinusoidal Oscillator Employing CCCDTA-based Allpass Filters with Only Grounded Passive Elements

This study describes the design of a multiphase sinusoidal oscillator (MSO) using CCCDTA-based allpass filters with grounded capacitors. The oscillation condition and oscillation frequency can be electronically/orthogonally controlled. The proposed MSO provides 2n (n>2) phase signals that are equally spaced in phase and of equal amplitude. The circuit requires one CCCDTA, one electronic resistor and one grounded capacitor per phase and no additional current amplifier and floating elements. High output impedances of the configuration enable the circuit to be cascaded to the current-mode circuit without additional current buffers. The effects of the non-idealities of the CCCDTA-allpass sections were also studied. The results of PSPICE simulations using CMOS CCCDTA are presented, demonstrating their consistency with theoretical assumptions

A wideband linear tunable CDTA and its application in field programmable analogue array

This document is the Accepted Manuscript version of the following article: Hu, Z., Wang, C., Sun, J. et al. ‘A wideband linear tunable CDTA and its application in field programmable analogue array’, Analog Integrated Circuits and Signal Processing, Vol. 88 (3): 465-483, September 2016. Under embargo. Embargo end date: 6 June 2017. The final publication is available at Springer via https://link.springer.com/article/10.1007%2Fs10470-016-0772-7 © Springer Science+Business Media New York 2016In this paper, a NMOS-based wideband low power and linear tunable transconductance current differencing transconductance amplifier (CDTA) is presented. Based on the NMOS CDTA, a novel simple and easily reconfigurable configurable analogue block (CAB) is designed. Moreover, using the novel CAB, a simple and versatile butterfly-shaped FPAA structure is introduced. The FPAA consists of six identical CABs, and it could realize six order current-mode low pass filter, second order current-mode universal filter, current-mode quadrature oscillator, current-mode multi-phase oscillator and current-mode multiplier for analog signal processing. The Cadence IC Design Tools 5.1.41 post-layout simulation and measurement results are included to confirm the theory.Peer reviewedFinal Accepted Versio

A Study of Particle Swarm Technique for Renewable Energy Power Systems

Abstract- Renewable power system is an innovative option forelectricity generation as it is a clean energy resource. Noting theclimate change becomes an important issue the whole world iscurrently facing, the ever-increasing price of petroleum products(now about US$ 80 a barrel) and the reduction in cost ofrenewable energy power systems, opportunities for renewableenergy systems to address electricity generation seems to beincreasing. However, to achieve commercialization andwidespread use, an efficient energy management strategy ofsystem needs to be addressed. Recently, particle swarmoptimization (PSO) has been successfully applied to the variousfields of power system including economic dispatch problems.This paper presents the survey of PSO in solving optimizationproblems in electric power systems. The introductory sectionsprovide the new way to implement renewable energy powersystem using particle swarm technique. Subsequent sectionscover recent trends of PSO development in renewable energypower systems. This technique would be useful to determine thepowerful energy management strategy so as to meet the requiredload demand at minimum operating cost while satisfying systemequality and inequality constraints.Keywords - Particle Swarm Optimization (PSO), Renewableenergy, Sustainable development6 Halama