Semiconductor integrated circuit designing method and semiconductor device

摘要

A transistor cell is designed by combining a transistor with passive elements such as a resistor, a capacitor, and an inductor. The parameters of the passive elements are determined so that the transistor cell has a maximum available gain characteristic that is flat in a desired frequency range. Matching circuits for input/output impedance matching for the transistor cell are designed so that loss occurring in the matching circuits has a flat frequency characteristic. A semiconductor integrated circuit is designed by combining the transistor cell and the matching circuits thus designed.