Automated synthesis and measurement of broadband CMOS buffer amplifier 1–5 GHz

The design and measurement results of broadband 1–5 GHz buffer amplifier (BA) MMIC based on CMOS transistors (0.25 um SiGe BiCMOS process) are presented. BA's topology was obtained by genetic-algorithm based software tool for structural-parametric synthesis Geneamp. The advantages of the developed amplifier for chosen fabrication process are: broadband frequency (overlap L-, S- and partially C-band); gain is 17.25±0.75 dB; low noise figure — less than 4 dB; high linearity OP1dB — more or equal to 13.2 dBm, OIP3 — more than 23.4 dBm. Designed amplifier is at a level of the best abroad counterparts by the presented above figures of merit. The amplifier design with Geneamp software tool significantly reduced the design time.