CFOA Based Active Universal Filter Realized With Multiple Feedback Filter, Low- Pass Filter and High Pass Filter

In this paper, CFOA based Universal Filters design is presented which is the combination of narrow band pass filter (multiple feedback filter), Low pass filter and High pass filter. The proposed circuit realizes all the standard of
frequency responses of universal filter. The proposed circuit uses narrow band pass filter so that the frequency response will be sharper and value of Q (quality factor) will be higher. It also uses low pass filter to select low frequency signals and high pass filter to passes high frequency signals only. The proposed circuit designed using AD844 IC that can be helpful in getting accurate response in different applications of filter and work for high frequency applications. The frequency range used here is in MHz to GHz. Simulation results and analysis have been carried out using NI-multisim software. Ultiboard results and 3D layout are also shown of the proposed circuit.