A synthesis-oriented approach to design microwave multidevice amplifiers with a prefixed stability margin

• Published in: IEEE microwave and guided wave letters 2000-03, Vol.10 (3), p.102-104
• Main Authors: Centurelli, F., Scotti, G., Tommasino, P., Trifiletti, A.
• Format: Article
• Language: English
• Subjects: Amplifiers; Applied sciences; Circuit stability; Circuit synthesis; Circuit theory (including computer-aided circuit design and analysis); Circuits; Computer aided design; Computer-aided design of microcircuits; layout and modeling; Design automation; Design methodology; Design optimization; Design. Technologies. Operation analysis. Testing; Distributed amplifiers; Electric, optical and optoelectronic circuits; Electronics; Equivalence; Exact sciences and technology; Integrated circuits; Methodology; Microwave amplifiers; Microwave theory and techniques; Microwaves; Millimeter wave circuits; Millimeter wave technology; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Specifications; Stability; Theoretical study. Circuits analysis and design
• ISSN: 1051-8207; 2771-957X; 1558-2329; 2771-9588
• DOI: 10.1109/75.845711

A design methodology that allows forcing a prefixed stability margin on microwave and millimeter-wave multidevice amplifiers during the synthesis procedure performed by CAD tools is proposed. To the best of our knowledge, for the first time expressions equivalent to stability margins have been determined to guide CAD optimizers to design circuits stable under parameter variations. Stability margins discussed in this paper allow inclusion of stability requirements among yield specifications in a rigorous way. A case study of a 4-FET distributed amplifier design is presented where stability under parameter variations has been achieved by using the proposed methodology.