A Band-Pass Filter Designed using CDTA for achieving high Quality Factor

Electronics and Communication Engineering

Band Pass Filters are devices that passes a particular band and rejects other frequencies. To obtain Band pass filters with high quality factors , various studies have been done, and various methods are adopted. CDTA ( Current Differencing Transconductance Amplifiers) are the circuits which can be employed to make band pass filters at high frequencies to achieve high quality factors without involving extra parasitic. This paper presents a review of the method which are been adopted to make a band pass filter to achieve a high quality factor using CDTA’s. Using the proposed method this paper is based on providing high quality factor by employing a feedback circuit to a second order filter. The used second order filter is improved in such a way that we can obtain a high impedance output. Thus, it cancels a requirement of any extra active element to obtain filter outputs. The whole circuit is deeply studied to understand the influence of parasitics and non idealities. Various other references on design of band pass is studied with use of CDTA and the proposed circuit is favourable in improving quality factor to much better extent without having parasitic developed and any effect on stability of circuits

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