A computer program for analysing networks containing three-terminal active devices characterized by their two-port parameters

The paper describes a general-purpose computer program which may be used to calculate the performance of a wide variety of 2-port networks. The circuit to be analysed may contain 3-terminal active devices (such as transistors) provided their 2-port parameters are known, and there are no restrictions (apart from an upper limit to the size of the circuit) on the manner in which the resistors, capacitors, inductors and 3-terminal devices may be joined together. Thus the performance of amplifiers having multi-loop feedback paths can be analysed. The program is written in Elliott 803 Autocode, and can analyse a large feedback amplifier in a few minutes.