Floating admittance matrix approach for evaluation of transfer functions using MATLAB

The mathematical model of any device provides an insight into the complete behavior of the physical system that reduces the problem to its essential characteristics. The floating admittance matrix (FAM) approach is a neat method of mathematical modeling of electronic devices and its uses in circuits. The zero sum property of the floating admittance matrix provides a check to proceed further or reobserve the first equation itself. All transfer functions are represented as cofactors of the floating admittance matrix of the circuit to yield the exact results without any approximation. We have plotted graphs for the various transfer functions (Voltage Gain, Current Gain, Power Gain, Input Resistance and Output Resistance) of the CE amplifier using MATLAB and on comparing our results with the approximate results available in the references, we got a very interesting method of increasing the stability of the system. The method employed is simple and easy to assimilate.