Graphical methods for network design including transistor circuits

A chart for use in general circuit design and particularly the design of circuits employing transistors, analogous to the circle diagrams and charts used in transmission-line and waveguide problems, is described. The chart is based on expressions which specify the devices or networks in terms of their image parameters. Practical examples in transistor circuit design are given, involving the exact calculation of quantities such as input and output impedances, voltage gain, etc. A procedure for the rapid determination of the conjugate matched impedance is also given. By treating feedback in a somewhat unconventional manner, it is shown that the chart may also be used in calculations involved in feedback circuits. Finally, the theoretical and experimental determination of the image parameters for transistors is described.