International Journal of Engineering and Information Systems (IJEAIS)   Year: 2022 | Volume: 6 | Issue: 10 | Page No.: 41-46 Simulation Of A Second-Order Current Generalized Immitance Structure (CGIC) Based Band Pass Biquad Filter For Fsk Telephone Communication Applications. Download PDF Atsuwe Bernard Aondofa. And Mom Joseph Abstract: This paper presented design and simulation of a second order CGIC Band pass Biquad filter for FSK telephone communication applications. One of the forms which this can be utilized in telephone communication is the modem. Modem is an abbreviation for Modulator-Demodulation used in transfer of data from one computer network to another through telephone lines. This technology is very fast and most used in the communications and information sector. The modem utilizes a bandpass filter both in the transmitters and receivers to enable sorting out of noise and other unwanted signals in the system. Hence the CGIC based filter was designed and simulated for this purpose. The filter used a pass band f 1200Hz to 2200Hz with a centre frequency of 1.70 kHz and a quantity factor of 50. Results from the simulation showed good agreement with the specified parameters and conclusion was made that it can be used in the implementation in modems for FSK telephone communications. Recommendations were also given.