Semiconductor integrated circuit designing method and semiconductor device

Abstract

It is intended to make it possible to design, easily without imposing undue load on a designer, a semiconductor integrated circuit that operates stably in a wide frequency range, to thereby provide a high-quality, low-cost semiconductor device capable of operating in a wide frequency range. A transistor cell is designed by combining a transistor with passive elements such as a resistor, a capacitor, and an inductor. The passive elements are so determined that the transistor cell has a maximum available gain characteristic that is flat in a desired frequency range. Matching circuits to serve for input/output impedance matching for the transistor cell are designed so that a 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.

Dependencies are inferred from the claim text.