Document Type : Research Paper
Abstract
This paper presents a computer-aided transistor circuit analysis package for a single-stage power amplifier using impedance and admittance parameters. This was borne out ofthe need to speed up the circuit design process by decreasing the time spent during circuit analysis. The methodology involves deriving the impedance and admittance parameter quantities namely voltage gain, current gain, input resistance, output resistance, and power gain from first principles. The softwareconsists ofthe development of a menu-based Graphical User Interface (GUI) which was developed using Swing, a Java GUI widget toolkit; programming in Java to carry out the mathematical analysis, and circuit simulation which was achieved using JSpice integrated with MULTISIM® for real-time circuit simulation and analysis.The programming was designed to flow as a main program based on the menuwith subroutines which comprises of z-parameter mathematical analysis subroutine, yparameter mathematical analysis subroutine, impedance equivalent circuit simulation subroutine, admittance equivalent circuit simulation subroutine, and power amplifier circuit simulation subroutine. The results obtained from the studies show that the developed software provides accurate mathematical circuit analysis and performs simulations correctly, quickly, and efficiently. It is therefore recommended that stakeholders in the field such as engineers, educational institutions, and the government should adopt this software for their use as it is reliable and fast in analyzing single-stage transistor power amplifiers.
